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		<title>Fisika Dasar:Listrik Statis</title>
		<link>http://blogsplonkz.wordpress.com/2009/05/20/fisika-dasarlistrik-statis/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/05/20/fisika-dasarlistrik-statis/#comments</comments>
		<pubDate>Wed, 20 May 2009 09:52:33 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Hukum Coulomb]]></category>
		<category><![CDATA[KLASIFIKASI MATERIAL]]></category>
		<category><![CDATA[Listrik Statis]]></category>
		<category><![CDATA[Medan listrik]]></category>
		<category><![CDATA[POTENSIAL LISTRIK]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=144</guid>
		<description><![CDATA[KLASIFIKASI MATERIAL 1. Konduktor Konduktor merupakan material yang mudah menghantarkan arus listrik. Contoh: tembaga. 2. Insulator Insulator merupakan material yang susah menghantarkan arus listrik. Contoh: kaca. 3. Semikonduktor Semikonduktor adalah material yang memilki sifat antara konduktor dan insulator. Contoh: silikon. HUKUM COULOMB Hukum Coulomb adalah hukyang menjelaskan hubungan antara gaya yang timbul antara dua titik [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=144&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>KLASIFIKASI MATERIAL<br />
1. Konduktor<br />
Konduktor merupakan material yang mudah menghantarkan arus listrik.<br />
Contoh: tembaga.<br />
2. Insulator<br />
Insulator merupakan material yang susah menghantarkan arus listrik.<br />
Contoh: kaca.<br />
3. Semikonduktor<br />
Semikonduktor adalah material yang memilki sifat antara konduktor dan insulator.<br />
Contoh: silikon.<br />
HUKUM COULOMB<br />
Hukum Coulomb adalah hukyang menjelaskan hubungan antara gaya yang timbul antara dua titik muatan, yang terpisahkan jarak tertentu.<br />
Dirumuskan:</p>
<p><img class="alignleft size-full wp-image-138" title="1" src="http://blogsplonkz.files.wordpress.com/2009/05/1.jpg?w=390" alt="1"   /> Keterangan:<br />
F : Gaya Coulomb (N)<br />
k : Konstanta Coulomb = <img class="alignnone size-full wp-image-139" title="2" src="http://blogsplonkz.files.wordpress.com/2009/05/2.jpg?w=390" alt="2"   /></p>
<p>q1 : besar muatan pertama (C)<br />
q2 : besar muatan kedua (C)<br />
r : jarak antar muatan (m)</p>
<p>Hukum ini menyatakan apabila terdapat dua buah titik muatan maka akan timbul gaya di antara keduanya, yang besarnya sebanding dengan perkalian nilai kedua muatan dan berbanding terbalik dengan kuadrat jarak antar keduanya.</p>
<p>Gaya yang timbul dapat membuat kedua titik muatan saling tarik-menarik atau saling tolak-menolak, tergantung nilai dari masing-masing muatan. Muatan sejenis (bertanda sama) akan tolak-menolak. Sedangkan muatan yang berbeda jenis akan tarik menarik</p>
<p>Dalam notasi vektor, Hukum Coulomb dapat dituliskan sebagai:</p>
<p><img class="aligncenter size-full wp-image-140" title="3" src="http://blogsplonkz.files.wordpress.com/2009/05/3.jpg?w=390" alt="3"   />MEDAN LISTRIK<br />
Medan listrik adalah efek yang ditimbulkan oleh keberadaan muatan listrik.<br />
Satuan listrik memiliki satuan N/C atau Newton/Coulomb.</p>
<p><img class="aligncenter size-full wp-image-141" title="4" src="http://blogsplonkz.files.wordpress.com/2009/05/4.jpg?w=390" alt="4"   /></p>
<p><img class="aligncenter size-full wp-image-142" title="5" src="http://blogsplonkz.files.wordpress.com/2009/05/5.jpg?w=390" alt="5"   />Jika dalam sebuah sistem terdapat banyak muatan, maka medan listrik di sebuah titik sama dengan jumlah vektor medan listrik dari masing-masing muatan pada titik tersebut.</p>
<p><img class="aligncenter size-full wp-image-133" title="6" src="http://blogsplonkz.files.wordpress.com/2009/05/6.jpg?w=390" alt="6"   /></p>
<p>ENERGI POTENSIAL ELEKTROSTATIK</p>
<p>Jika terdapat dua benda titik bermuatan q1 dan q2 yang terpisah pada jarak r, maka besar energi potensial system tersebut adalah:</p>
<p><img class="aligncenter size-full wp-image-134" title="7" src="http://blogsplonkz.files.wordpress.com/2009/05/7.jpg?w=390" alt="7"   />Jika ada lebih dari dua muatan, maka energi potensial yang tersimpan dalam sistem tersebut adalah jumlah dari energi potensial dari tiap pasang muatan yang ada. Contoh untuk tiga muatan</p>
<p><img class="aligncenter size-full wp-image-135" title="8" src="http://blogsplonkz.files.wordpress.com/2009/05/8.jpg?w=390" alt="8"   /></p>
<p>POTENSIAL LISTRIK</p>
<p>Beda potensial antara titik A dan B didefinisikan sebagai perubahan energi potensial sebuah muatan q yang digerakkan dari A ke B, dibagi dengan muatan tersebut.</p>
<p><img class="aligncenter size-full wp-image-136" title="9" src="http://blogsplonkz.files.wordpress.com/2009/05/9.jpg?w=390" alt="9"   />Potensial listrik dari muatan titik q pada sebuah titik yang berjarak r dari muatan tersebut adalah :</p>
<p><img class="aligncenter size-full wp-image-137" title="10" src="http://blogsplonkz.files.wordpress.com/2009/05/10.jpg?w=390" alt="10"   /></p>
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		<item>
		<title>Fisika Dasar:Hukum Coulomb</title>
		<link>http://blogsplonkz.wordpress.com/2009/05/06/fisika-dasarhukum-coulomb/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/05/06/fisika-dasarhukum-coulomb/#comments</comments>
		<pubDate>Wed, 06 May 2009 06:55:21 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Hukum Coulomb]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=120</guid>
		<description><![CDATA[HUKUM COULOMB Hukum Coulomb, kadang-kadang disebut hukum Coulomb, adalah satu persamaan yang menggambarkan kekuatan elektrostatik antara muatan elektrik yang terpisahkan jarak tertentu, degan nilai muatan dan jarak pisah keduanya. Dikembangkan pada 1780-an oleh ahli ilmu fisika Perancis Charles Augustin de Coulomb yang merupakan orang penting pada pengembangan teori keelektromagnetan. Hukum Coulomb dapat dinyatakan sebagai berikut: [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=120&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<h1 style="text-align:center;"><strong>HUKUM COULOMB</strong></h1>
<p style="text-align:center;"><!--[if !mso]&gt; &lt;!  v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} --> <!--[endif]--><!--[if gte mso 9]&gt;  Normal 0     false false false  EN-US X-NONE X-NONE                           &lt;![endif]--><!--[if gte mso 9]&gt;                                                                                                                                            &lt;![endif]--><!--  /* Font Definitions */  @font-face 	{font-family:"Cambria Math"; 	panose-1:2 4 5 3 5 4 6 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:roman; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1107304683 0 0 159 0;} @font-face 	{font-family:Calibri; 	panose-1:2 15 5 2 2 2 4 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:swiss; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1073750139 0 0 159 0;}  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-unhide:no; 	mso-style-qformat:yes; 	mso-style-parent:""; 	margin-top:0cm; 	margin-right:0cm; 	margin-bottom:10.0pt; 	margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	mso-bidi-font-size:11.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi; 	mso-ansi-language:IN;} .MsoChpDefault 	{mso-style-type:export-only; 	mso-default-props:yes; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;} .MsoPapDefault 	{mso-style-type:export-only; 	margin-bottom:10.0pt; 	line-height:115%;} @page Section1 	{size:612.0pt 792.0pt; 	margin:72.0pt 72.0pt 72.0pt 72.0pt; 	mso-header-margin:36.0pt; 	mso-footer-margin:36.0pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;} --><!--[if gte mso 10]&gt; &lt;!   /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Table Normal"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-priority:99; 	mso-style-qformat:yes; 	mso-style-parent:""; 	mso-padding-alt:0cm 5.4pt 0cm 5.4pt; 	mso-para-margin-top:0cm; 	mso-para-margin-right:0cm; 	mso-para-margin-bottom:10.0pt; 	mso-para-margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:11.0pt; 	font-family:"Calibri","sans-serif"; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:"Times New Roman"; 	mso-fareast-theme-font:minor-fareast; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin;} --> <!--[endif]--></p>
<p class="MsoNormal" style="text-align:justify;"><span lang="IN">Hukum Coulomb, kadang-kadang disebut hukum Coulomb, adalah satu persamaan yang menggambarkan kekuatan elektrostatik antara muatan elektrik yang terpisahkan jarak tertentu, degan nilai muatan dan jarak pisah keduanya. Dikembangkan pada 1780-an oleh ahli ilmu fisika Perancis Charles Augustin de Coulomb yang merupakan orang penting pada pengembangan teori keelektromagnetan. Hukum Coulomb dapat dinyatakan sebagai berikut:</span></p>
<p class="MsoNormal" style="text-align:justify;"><span lang="IN"><img class="aligncenter size-full wp-image-121" title="clip_image002" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image002.gif?w=390" alt="clip_image002"   /></span></p>
<p class="MsoNormal" style="text-align:justify;"><span id="more-120"></span></p>
<p class="MsoNormal" style="text-align:justify;"><span lang="IN">Dimana r adalah jarak antara kedua titik dan <img class="alignnone size-full wp-image-122" title="clip_image004" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image004.gif?w=390" alt="clip_image004"   /> </span><span lang="IN">adalah konstanta Coulomb, gaya tarik menarik akan terjadi jika kedua muatan (q<sub>1</sub> dan q<sub>2</sub>) berbeda jenis dan akan tolak-menolak jika kedua muatan sama.</span></p>
<p class="MsoNormal" style="text-align:justify;"><span lang="IN">Kontanta Coulomb <img class="alignnone size-full wp-image-123" title="clip_image006" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image006.gif?w=390" alt="clip_image006"   /> </span><span style="line-height:115%;" lang="IN">dapat dijabarkan sebagai berikut:</span></p>
<p class="MsoNormal" style="text-align:justify;">
<p class="MsoNormal" style="text-align:justify;">
<p><img class="alignnone size-full wp-image-129" title="clip_image0041" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image0041.gif?w=390" alt="clip_image0041"   /> = <img class="alignnone size-full wp-image-124" title="clip_image008" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image008.gif?w=390" alt="clip_image008"   /></p>
<p class="MsoNormal" style="text-align:justify;">= <img class="alignnone size-full wp-image-125" title="clip_image010" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image010.gif?w=390" alt="clip_image010"   /></p>
<p class="MsoNormal" style="text-align:justify;">= <img class="alignnone size-full wp-image-126" title="clip_image012" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image012.gif?w=390" alt="clip_image012"   /></p>
<p class="MsoNormal" style="text-align:justify;">=<img class="alignnone size-full wp-image-127" title="clip_image014" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image014.gif?w=390&#038;h=26" alt="clip_image014" width="390" height="26" /></p>
<p class="MsoNormal" style="text-align:justify;"><span style="font-size:11pt;line-height:115%;color:black;" lang="IN">Dalam satuan SI,<span> </span>kelajuan cahaya di dalam ruang hampa, c<sub>0</sub> didefinisikan sebagai 299,792,458 m · s<sup>-1</sup>, dan konstanta magnetik (µ<sub>0</sub>), didefinisikan sebagai 4π × 10<sup>-7</sup> H · m<sup>-1</sup>,<span> </span>mengacu <span> </span>definisi untuk ketetapan elektrik (ε<sub> 0</sub>) dengan ε<sub>0</sub> = <img class="alignnone size-full wp-image-128" title="clip_image016" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image016.gif?w=390" alt="clip_image016"   /> =</span><span lang="IN">≈ 8.854 187 817 </span><span lang="IN">× </span><span lang="IN">10<sup>−12</sup> F </span><span lang="IN">·</span><span lang="IN"> m<sup>−1</sup></span><span style="font-size:11pt;line-height:115%;color:black;" lang="IN">. Pada aturan cgs, konstanta Coulomb ditetapkan adalah 1.</span><span style="font-size:11pt;line-height:115%;color:black;" lang="IN"></span></p>
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		<item>
		<title>FISIKA:Alat Optik</title>
		<link>http://blogsplonkz.wordpress.com/2009/04/08/fisikaalat-optik/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/04/08/fisikaalat-optik/#comments</comments>
		<pubDate>Wed, 08 Apr 2009 04:27:16 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Alat Optik]]></category>
		<category><![CDATA[LUP]]></category>
		<category><![CDATA[Mikroskop]]></category>
		<category><![CDATA[Teropong bintang]]></category>
		<category><![CDATA[Teropong Bum]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=110</guid>
		<description><![CDATA[A. LUP Lup (kaca pembesar) adalah alat optik yang terdiri dari sebuah lensa cembung. Fungsinya, untuk melihat benda benda kecil. Sifat bayangannya maya, tegak, diperbesar. Perbesaran Lup Untuk Mata Berakomodasi dengan Jarak x : Perbesaran Lup untuk Mata Berakomodasi Maksimum : Perbesaran Lup untuk Mata Tidak Berakomodasi : B. MIKROSKOP Sifat Bayangan: - Lensa Objektif: [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=110&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>A. LUP</p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Lup (kaca pembesar) adalah alat optik yang terdiri dari sebuah lensa cembung.</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Fungsinya, untuk melihat benda benda kecil.</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Sifat bayangannya maya, tegak, diperbesar.</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><br />
</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Perbesaran Lup Untuk Mata Berakomodasi dengan Jarak x :</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><img class="aligncenter size-full wp-image-114" title="perbesaran-lup-jarak-x" src="http://blogsplonkz.files.wordpress.com/2009/04/perbesaran-lup-jarak-x.png?w=390" alt="perbesaran-lup-jarak-x"   /></span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Perbesaran Lup untuk Mata Berakomodasi Maksimum :<br />
<img class="aligncenter size-full wp-image-117" title="lup-berakomodasi-maks1" src="http://blogsplonkz.files.wordpress.com/2009/04/lup-berakomodasi-maks1.png?w=390" alt="lup-berakomodasi-maks1"   /></span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Perbesaran Lup untuk Mata Tidak Berakomodasi :</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><img class="aligncenter size-full wp-image-111" title="lup-tak-akomodasi" src="http://blogsplonkz.files.wordpress.com/2009/04/lup-tak-akomodasi.png?w=390" alt="lup-tak-akomodasi"   /></span><span id="more-110"></span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">B. MIKROSKOP</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Sifat Bayangan:</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">- Lensa Objektif: Nyata, terbalik, diperbesar</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">- Lensa Okuler: Nyata, terbalik, diperbesar.</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Jarak fokus untuk Lensa Objektif :</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><img class="aligncenter size-full wp-image-112" title="mikroskop-ob" src="http://blogsplonkz.files.wordpress.com/2009/04/mikroskop-ob.png?w=390" alt="mikroskop-ob"   /></span><span style="font-size:12pt;line-height:115%;">Jarak fokus Lensa Okuler :</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><img class="aligncenter size-full wp-image-113" title="mikroskop-ok1" src="http://blogsplonkz.files.wordpress.com/2009/04/mikroskop-ok1.png?w=390" alt="mikroskop-ok1"   /></span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Perbesaran pada Mikroskop</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">M = Mob x Mok</span></p>
<p class="MsoNormal">
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">C. TEROPONG</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">1. Teropong Bintang</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Sifat bayangan: maya, terbalik, diperbesar.</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Perbesaran bayangannya:</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><img class="aligncenter size-full wp-image-115" title="terbintang-perbesaran" src="http://blogsplonkz.files.wordpress.com/2009/04/terbintang-perbesaran.png?w=390" alt="terbintang-perbesaran"   /></span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">2. Teropong Bumi</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Sifat bayangan: maya, tegak,diperbesar.</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;">Perbesaran bayangannya:</span></p>
<p class="MsoNormal"><span style="font-size:12pt;line-height:115%;"><img class="aligncenter size-full wp-image-116" title="terbintang-perbesaran1" src="http://blogsplonkz.files.wordpress.com/2009/04/terbintang-perbesaran1.png?w=390" alt="terbintang-perbesaran1"   /><br />
</span></p>
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		<slash:comments>9</slash:comments>
	
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		<item>
		<title>FISIKA:Pembiasan Cahaya</title>
		<link>http://blogsplonkz.wordpress.com/2009/04/08/fisikapembiasan-cahaya/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/04/08/fisikapembiasan-cahaya/#comments</comments>
		<pubDate>Wed, 08 Apr 2009 04:02:01 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Hukum Pembiasan Cahaya]]></category>
		<category><![CDATA[Lensa]]></category>
		<category><![CDATA[Pembiasan cahaya]]></category>
		<category><![CDATA[Persamaan indeks bias mutlak]]></category>
		<category><![CDATA[Rumus Kuat Lensa]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=107</guid>
		<description><![CDATA[Pembiasan cahaya adalah pembelokan cahaya ketika berkas cahaya melewati bidang batas dua medium yang berbeda indeks biasnya. Indeks bias mutlak suatu bahan adalah perbandingan kecepatan cahaya di ruang hampa dengan kecepatan cahaya di bahan tersebut. Indeks bias relatif merupakan perbandingan indeks bias dua medium berbeda. Indeks bias relatif medium kedua terhadap medium pertama adalah perbandingan [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=107&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p style="text-align:justify;">Pembiasan cahaya adalah pembelokan cahaya ketika berkas cahaya melewati bidang batas dua medium yang berbeda indeks biasnya. Indeks bias mutlak suatu bahan adalah perbandingan kecepatan cahaya di ruang hampa dengan kecepatan cahaya di bahan tersebut. Indeks bias relatif merupakan perbandingan indeks bias dua medium berbeda. Indeks bias relatif medium kedua terhadap medium pertama adalah perbandingan indeks bias antara medium kedua dengan indeks bias medium pertama. Pembiasan cahaya menyebabkan kedalaman semu dan pemantulan sempurna.</p>
<p style="text-align:justify;">1. Persamaan indeks bias mutlak<img class="aligncenter size-full wp-image-105" title="pembiasan-cahaya-mutlak" src="http://blogsplonkz.files.wordpress.com/2009/04/pembiasan-cahaya-mutlak.png?w=390" alt="pembiasan-cahaya-mutlak"   /></p>
<p style="text-align:justify;">2. Hukum Pembiasan Cahaya</p>
<p style="text-align:justify;"><img class="aligncenter size-full wp-image-103" title="hukum-pembiasan-cahaya" src="http://blogsplonkz.files.wordpress.com/2009/04/hukum-pembiasan-cahaya.png?w=390" alt="hukum-pembiasan-cahaya"   /></p>
<p style="text-align:justify;"><span id="more-107"></span></p>
<p style="text-align:justify;"><span style="font-family:Arial,Helvetica,sans-serif;"><span style="font-family:Verdana;font-size:x-small;">Lensa adalah peralatan sangat penting dalam kehidupan manusia. Mikroskop menggunakan susunan lensa untuk melihat jasad-jasad renik yang tak terlihat oleh mata telanjang. Kamera menggunakan susunan lensa agar dapat merekam obyek dalam film. Teleskop juga memanfaatkan lensa untuk melihat bintang-bintang yang jaraknya jutaan tahun cahaya dari bumi.</span></span></p>
<p style="text-align:justify;"><span style="font-family:Verdana,Arial,Helvetica,sans-serif;font-size:x-small;">Kuat lensa berkaitan dengan sifat konvergen (mengumpulkan berkas sinar) dan divergen (menyebarkan sinar) suatu lensa. Untuk Lensa positif, semakin kecil jarak fokus, semakin kuat kemampuan lensa itu untuk mengumpulkan berkas sinar. Untuk Lensa negatif, semakin kecil jarak fokus semakin kuat kemampuan lensa itu untuk menyebarkan berkas sinar. Oleh karenanya kuat lensa didefinisikan sebagai kebalikan dari jarak fokus.</span></p>
<p style="text-align:justify;"><span style="font-family:Verdana,Arial,Helvetica,sans-serif;font-size:x-small;">Rumus Kuat Lensa :</span></p>
<p style="text-align:justify;"><span style="font-family:Verdana,Arial,Helvetica,sans-serif;font-size:x-small;"><br />
<img class="aligncenter size-full wp-image-104" title="kuat-lensa-rumus" src="http://blogsplonkz.files.wordpress.com/2009/04/kuat-lensa-rumus.png?w=390" alt="kuat-lensa-rumus"   /></span></p>
<p style="text-align:justify;">Pembentukan Bayangan Pada Lensa :</p>
<p style="text-align:justify;"><img class="aligncenter size-full wp-image-106" title="pembentukan-bayangan" src="http://blogsplonkz.files.wordpress.com/2009/04/pembentukan-bayangan.png?w=390" alt="pembentukan-bayangan"   /></p>
<p style="text-align:justify;">Lensa Gabungan :</p>
<p style="text-align:justify;"><img class="aligncenter size-full wp-image-102" title="fgabungan" src="http://blogsplonkz.files.wordpress.com/2009/04/fgabungan.png?w=390" alt="fgabungan"   /></p>
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		<slash:comments>13</slash:comments>
	
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		<item>
		<title>FISIKA:PENCERMINAN</title>
		<link>http://blogsplonkz.wordpress.com/2009/04/08/fisikapencerminan/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/04/08/fisikapencerminan/#comments</comments>
		<pubDate>Wed, 08 Apr 2009 03:12:38 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[penceminan cermin cekung]]></category>
		<category><![CDATA[pencerminan cermin cembung]]></category>
		<category><![CDATA[pencerminan cermin datar]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=87</guid>
		<description><![CDATA[PENCERMINAN 1. Cermin Datar Jarak bayangan ke cermin = jarak benda ke cermin. Tinggi bayangan = tinggi benda. Bayangan bersifat maya, tegak, dan di belakang cermin. 2. Cermin Cekung Untuk dapat melukis bayangan yang dibentuk oleh cermin cekung, biasanya digunakan tiga sinar istimewa. Sinar istimewa sinar datang yang lintasannya mudah diramalkan tanpa harus mengukur sudut [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=87&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<h1 style="text-align:center;">PENCERMINAN</h1>
<p style="text-align:center;">
<p><!--[if !mso]&gt; &lt;!  v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} --></p>
<p><!--[endif]--></p>
<p><!--[if gte mso 9]&gt;  Normal 0 false    false false false  EN-US X-NONE X-NONE              MicrosoftInternetExplorer4              &lt;![endif]--><!--[if gte mso 9]&gt;                                                                                                                                            &lt;![endif]--><!--  /* Font Definitions */  @font-face 	{font-family:Wingdings; 	panose-1:5 0 0 0 0 0 0 0 0 0; 	mso-font-charset:2; 	mso-generic-font-family:auto; 	mso-font-pitch:variable; 	mso-font-signature:0 268435456 0 0 -2147483648 0;} @font-face 	{font-family:"Cambria Math"; 	panose-1:2 4 5 3 5 4 6 3 2 4; 	mso-font-charset:1; 	mso-generic-font-family:roman; 	mso-font-format:other; 	mso-font-pitch:variable; 	mso-font-signature:0 0 0 0 0 0;} @font-face 	{font-family:Calibri; 	panose-1:2 15 5 2 2 2 4 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:swiss; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1073750139 0 0 159 0;}  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-unhide:no; 	mso-style-qformat:yes; 	mso-style-parent:""; 	margin-top:0cm; 	margin-right:0cm; 	margin-bottom:10.0pt; 	margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	mso-bidi-font-size:11.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi; 	mso-ansi-language:IN;} p 	{mso-style-noshow:yes; 	mso-style-priority:99; 	mso-margin-top-alt:auto; 	margin-right:0cm; 	mso-margin-bottom-alt:auto; 	margin-left:0cm; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:"Times New Roman";} .MsoChpDefault 	{mso-style-type:export-only; 	mso-default-props:yes; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;} .MsoPapDefault 	{mso-style-type:export-only; 	margin-bottom:10.0pt; 	line-height:115%;} @page Section1 	{size:612.0pt 792.0pt; 	margin:72.0pt 72.0pt 72.0pt 72.0pt; 	mso-header-margin:35.4pt; 	mso-footer-margin:35.4pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;}  /* List Definitions */  @list l0 	{mso-list-id:925574707; 	mso-list-template-ids:791563566;} @list l0:level1 	{mso-level-number-format:bullet; 	mso-level-text:; 	mso-level-tab-stop:36.0pt; 	mso-level-number-position:left; 	text-indent:-18.0pt; 	mso-ansi-font-size:10.0pt; 	font-family:Symbol;} ol 	{margin-bottom:0cm;} ul 	{margin-bottom:0cm;} --></p>
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<p><!--[endif]--><strong>1. Cermin Datar</strong></p>
<ul type="disc">
<li class="MsoNormal"><span lang="IN">Jarak bayangan ke cermin = jarak benda ke cermin.</span></li>
<li class="MsoNormal"><span lang="IN">Tinggi bayangan = tinggi benda.</span></li>
<li class="MsoNormal"><span lang="IN">Bayangan bersifat maya, tegak, dan di belakang cermin.</span></li>
</ul>
<p><strong>2. Cermin Cekung</strong></p>
<p>Untuk dapat melukis bayangan yang dibentuk oleh cermin cekung, biasanya digunakan tiga sinar istimewa. Sinar istimewa sinar datang yang lintasannya mudah diramalkan tanpa harus mengukur sudut datang dan sudut pantulnya. Tiga sinar istimewa itu adalah:</p>
<p>1. Sinar yang melalui pusat kelengkungan cermin akan dipantulkan melalui pusat kelengkungan itu lagi.</p>
<p><img class="aligncenter size-full wp-image-88" title="clip_image002" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image002.jpg?w=390" alt="clip_image002"   /></p>
<p>2. Sinar yang datang sejajar sumbu utama akan dipantulkan melalui fokus utama.</p>
<p><img class="aligncenter size-full wp-image-89" title="clip_image004" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image004.jpg?w=390" alt="clip_image004"   />3. Sinar yang datang melalui fokus utama akan dipantulkan sejajar sumbu utama.</p>
<p><img class="aligncenter size-full wp-image-90" title="clip_image006" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image006.jpg?w=390" alt="clip_image006"   /><span id="more-87"></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><strong><span lang="IN">3. Cermin Cembung</span></strong></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN">Sama dengan cermin cekung, cermin cembung juga mempunyai tiga sinar istimewa. Karena jarak fokus dan pusat kelengkungan cermin cembung berada di belakang cermin maka ketiga sinar istimewa pada cermin cembung tersebut adalah:</span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN">1. Sinar yang datang menuju pusat kelengkungan akan dipantulkan kembali.</span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN"><img class="aligncenter size-full wp-image-91" title="clip_image008" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image008.jpg?w=390" alt="clip_image008"   /></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN">2. Sinar yang datang sejajar sumbu utama akan dipantulkan seolah &#8211; olah dari titik fokus.</span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN"><img class="aligncenter size-full wp-image-92" title="clip_image010" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image010.jpg?w=390" alt="clip_image010"   /></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN">3. Sinar yang datang menuju fokus akan dipantulkan sejajar sumbu utama.</span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN"><img class="aligncenter size-full wp-image-93" title="clip_image012" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image012.jpg?w=390" alt="clip_image012"   /></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><strong><span lang="IN">Hubungan jarak benda (s), jarak fokus (f), dan jarak bayangan (s’)</span></strong></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><strong><span lang="IN"><img class="aligncenter size-full wp-image-94" title="clip_image014" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image014.jpg?w=390" alt="clip_image014"   /></span></strong><span lang="IN"></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN">atau :</span></p>
<p class="MsoNormal" style="text-align:justify;line-height:150%;"><span lang="IN"><img class="aligncenter size-full wp-image-95" title="clip_image016" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image016.jpg?w=390" alt="clip_image016"   /></span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">dengan:</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">f : jarak fokus cermin (m)</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">s : jarak benda ke cermin (m)</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">s’ : jarak bayangan ke cermin (m)</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">R : pusat kelengkungan cermin (m)</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN"><br />
</span></p>
<p class="MsoNormal" style="line-height:150%;"><strong><span lang="IN">Perbesaran Bayangan Pada Cermin</span></strong></p>
<p class="MsoNormal" style="line-height:150%;"><strong><span lang="IN"><img class="aligncenter size-full wp-image-96" title="clip_image018" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image018.jpg?w=390" alt="clip_image018"   /></span></strong></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">dengan :</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">M : perbesaran bayangan </span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">h’ : tinggi bayangan benda</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">h : tinggi benda</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">s’ : jarak bayangan benda ke cermin</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">s : jarak benda ke cermin</span></p>
<p class="MsoNormal" style="line-height:150%;"><strong><span lang="IN">Contoh Soal:</span></strong></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">Sebuah benda berdiri tegak 10 cm di depan cermin cembung yang mempunyai titik fokus 30 cm. Jika tinggi benda 2 m, maka tinggi bayangan yang terbentuk dan besar perbesaran benda adalah…</span></p>
<p class="MsoNormal" style="line-height:150%;"><strong><span lang="IN">Diketahui:</span></strong></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">s = 10 cm</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">f = 30 cm</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">h = 2 m</span></p>
<p class="MsoNormal" style="line-height:150%;"><strong><span lang="IN">Ditanya:</span></strong></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">s’ = …<br />
</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">M = …<br />
</span></p>
<p class="MsoNormal" style="line-height:150%;"><strong><span lang="IN">Jawab:</span></strong></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">a)<img class="aligncenter size-full wp-image-97" title="clip_image020" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image020.jpg?w=390" alt="clip_image020"   /></span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN">b)</span></p>
<p class="MsoNormal" style="line-height:150%;"><span lang="IN"><img class="aligncenter size-full wp-image-98" title="clip_image022" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image022.jpg?w=390" alt="clip_image022"   /><br />
</span></p>
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		<title>FISIKA:Cahaya</title>
		<link>http://blogsplonkz.wordpress.com/2009/04/08/fisikacahaya/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/04/08/fisikacahaya/#comments</comments>
		<pubDate>Wed, 08 Apr 2009 02:34:08 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Rumus kecepatan-cahaya]]></category>
		<category><![CDATA[Sejarah pengukuran kelajuan cahaya]]></category>
		<category><![CDATA[Teori tentang cahaya]]></category>
		<category><![CDATA[Warna dan Panjang Gelombang]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=84</guid>
		<description><![CDATA[Cahaya merupakan sejenis energi berbentuk gelombang elektromagnetik yang bisa dilihat dengan mata. Cahaya juga merupakan dasar ukuran meter: 1 meter adalah jarak yang dilalui cahaya melalui vakum pada 1/299,792,458 detik. Kecepatan cahaya adalah 299,792,458 meter per detik. Cahaya diperlukan dalam kehidupan sehari-hari. Matahari adalah sumber cahaya utama di Bumi. Tumbuhan hijau memerlukan cahaya untuk membuat [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=84&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Cahaya merupakan sejenis energi berbentuk gelombang elektromagnetik yang bisa dilihat dengan mata. Cahaya juga merupakan dasar ukuran meter: 1 meter adalah jarak yang dilalui cahaya melalui vakum pada 1/299,792,458 detik. Kecepatan cahaya adalah 299,792,458 meter per detik.<img class="aligncenter size-full wp-image-83" title="cahaya" src="http://blogsplonkz.files.wordpress.com/2009/04/cahaya.jpg?w=390" alt="cahaya"   /></p>
<p style="text-align:justify;"><span lang="IN">Cahaya diperlukan dalam kehidupan sehari-hari. <span style="color:windowtext;text-decoration:none;">Matahari</span> adalah sumber cahaya utama di <span style="color:windowtext;text-decoration:none;">Bumi</span>. <span style="color:windowtext;text-decoration:none;">Tumbuhan</span> hijau memerlukan cahaya untuk membuat makanan.</span></p>
<p style="text-align:justify;"><span lang="IN">Sifat-sifat cahaya ialah, cahaya bergerak lurus ke semua arah. Buktinya adalah kita dapat melihat sebuah lampu yang menyala dari segala penjuru dalam sebuah ruang gelap. Apabila cahaya terhalang, bayangan yang dihasilkan disebabkan cahaya yang bergerak lurus tidak dapat berbelok. Namun cahaya <span style="color:windowtext;text-decoration:none;">dapat dipantulkan</span> .</span></p>
<p style="text-align:justify;"><span lang="IN"><span id="more-84"></span><br />
</span></p>
<p class="MsoNormal" style="text-align:justify;"><span lang="IN"></span><!--[if gte mso 9]&gt;  Normal 0     false false false  EN-US X-NONE X-NONE              MicrosoftInternetExplorer4              &lt;![endif]--><!--[if gte mso 9]&gt;                                                                                                                                            &lt;![endif]--><!--  /* Font Definitions */  @font-face 	{font-family:"Cambria Math"; 	panose-1:2 4 5 3 5 4 6 3 2 4; 	mso-font-charset:1; 	mso-generic-font-family:roman; 	mso-font-format:other; 	mso-font-pitch:variable; 	mso-font-signature:0 0 0 0 0 0;} @font-face 	{font-family:Calibri; 	panose-1:2 15 5 2 2 2 4 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:swiss; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1073750139 0 0 159 0;}  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-unhide:no; 	mso-style-qformat:yes; 	mso-style-parent:""; 	margin-top:0cm; 	margin-right:0cm; 	margin-bottom:10.0pt; 	margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	mso-bidi-font-size:11.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi; 	mso-ansi-language:IN;} .MsoChpDefault 	{mso-style-type:export-only; 	mso-default-props:yes; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;} .MsoPapDefault 	{mso-style-type:export-only; 	margin-bottom:10.0pt; 	line-height:115%;} @page Section1 	{size:612.0pt 792.0pt; 	margin:72.0pt 72.0pt 72.0pt 72.0pt; 	mso-header-margin:36.0pt; 	mso-footer-margin:36.0pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;} --><!--[if gte mso 10]&gt; &lt;!   /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Table Normal"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-priority:99; 	mso-style-qformat:yes; 	mso-style-parent:""; 	mso-padding-alt:0cm 5.4pt 0cm 5.4pt; 	mso-para-margin-top:0cm; 	mso-para-margin-right:0cm; 	mso-para-margin-bottom:10.0pt; 	mso-para-margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:11.0pt; 	font-family:"Calibri","sans-serif"; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:"Times New Roman"; 	mso-fareast-theme-font:minor-fareast; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin;} --> <!--[endif]--></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:18pt;">Teori tentang cahaya</span></strong></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;">Teori abad ke-10</span></strong></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Ilmuwan <span style="color:windowtext;text-decoration:none;">Abu Ali Hasan Ibn Al-Haitham</span> (965–sekitar 1040), dikenal juga sebagai Alhazen, mengembangkan teori yang menjelaskan penglihatan, menggunakan geometri dan anatomi. Teori itu menyatakan bahwa setiap titik pada daerah yang tersinari cahaya, mengeluarkan sinar cahaya ke segala arah, namun hanya satu sinar dari setiap titik yang masuk ke mata secara tegak lurus yang dapat dilihat. Cahaya lain yang mengenai mata tidak secara tegak lurus tidak dapat dilihat. Dia menggunakan kamera lubang jarum sebagai contoh, yang menampilkan sebuah citra terbalik. Alhazen menganggap bahwa sinar cahaya adalah kumpulan partikel kecil yang bergerak pada kecepatan tertentu. Dia juga mengembangkan teori <span style="color:windowtext;text-decoration:none;">Ptolemy</span> tentang refraksi cahaya namun usaha Alhazen tidak dikenal di Eropa sampai pada akhir abad 16.</span></p>
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<p style="text-align:justify;"><!--[endif]--></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Teori <span style="color:windowtext;text-decoration:none;">Partikel</span></span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN"><span style="color:windowtext;text-decoration:none;">Isaac Newton</span> menyatakan dalam <em>Hypothesis of Light</em> pada <span style="color:windowtext;text-decoration:none;">1675</span> bahwa cahaya terdiri dari partikel halus (<em>corpuscles</em>) yang memancar ke semua arah dari sumbernya. Teori ini dapat digunakan untuk menerangkan <span style="color:windowtext;text-decoration:none;">pantulan</span> cahaya, tetapi hanya dapat menerangkan <span style="color:windowtext;text-decoration:none;">pembiasan</span> dengan menganggap cahaya menjadi lebih cepat ketika memasuki <span style="color:windowtext;text-decoration:none;">medium</span> yang padat tumpat karena daya tarik <span style="color:windowtext;text-decoration:none;">gravitasi</span> lebih kuat.</span></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Teori <span style="color:windowtext;text-decoration:none;">Gelombang</span> (atau <em>Ray</em>)</span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN"><span style="color:windowtext;text-decoration:none;">Christiaan Huygens</span> menyatakan dalam <span style="color:windowtext;text-decoration:none;">abad</span> ke-17 yang cahaya dipancarkan ke semua arah sebagai ciri-ciri gelombang. Pandangan ini menggantikan teori partikel halus. Ini disebabkan oleh karena gelombang tidak diganggu oleh gravitasi, dan gelombang menjadi lebih lambat ketika memasuki medium yang lebih padat. Teori gelombang ini menyatakan bahwa gelombang cahaya akan berinterferensi dengan gelombang cahaya yang lain seperti gelombang <span style="color:windowtext;text-decoration:none;">bunyi</span> (seperti yang disebut oleh <span style="color:windowtext;text-decoration:none;">Thomas Young</span> pada <span style="color:windowtext;text-decoration:none;">kurun</span> ke-18), dan cahaya dapat <span style="color:windowtext;text-decoration:none;">dipolarisasikan</span>. Kelemahan teori ini adalah gelombang cahaya seperti gelombang bunyi, memerlukan medium untuk dihantar. Suatu hipotesis yang disebut <span style="color:windowtext;text-decoration:none;">luminiferous aether</span> telah diusulkan, tetapi hipotesis itu tidak disetujui.</span></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Teori <span style="color:windowtext;text-decoration:none;">Elektromagnetik</span></span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Pada 1845 Faraday menemukan bahwa sudut polarisasi dari sebuah sinar cahaya ketika sinar tersebut masuk melewati material pemolarisasi dapat diubah dengan medan magnet.Ini adalah bukti pertama kalau cahaya berhubungan dengan Elektromagnetisme. Faraday mengusulkan pada tahun 1847 bahwa cahaya adalah getaran elektromagnetik berfrekuensi tinggi yang dapat bertahan walaupun tidak ada medium.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Teori ini diusulkan oleh <span style="color:windowtext;text-decoration:none;">James Clerk Maxwell</span> pada akhir <span style="color:windowtext;text-decoration:none;">abad ke-19</span>, menyebut bahwa gelombang cahaya adalah gelombang elektromagnet sehingga tidak memerlukan medium untuk merambat. Pada permukaannya dianggap gelombang cahaya disebarkan melalui <span style="color:windowtext;text-decoration:none;">kerangka acuan</span> yang tertentu, seperti aether, tetapi <span style="color:windowtext;text-decoration:none;">teori relativitas khusus</span> menggantikan anggapan ini. Teori elektromagnet menunjukkan yang sinar kasat mata adalah sebagian daripada spektrum elektromagnet. Teknologi penghantaran radio diciptakan berdasarkan teori ini dan masih digunakan.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Kecepatan cahaya yang konstan berdasarkan persamaan Maxwell berlawanan dengan hukum-hukum mekanis gerakan yang telah bertahan sejak zaman Galileo, yang menyatakan bahwa segala macam laju adalah relatif terhadap laju sang pengamat. Pemecahan terhadap kontradiksi ini kelak akan ditemukan oleh <span style="color:windowtext;text-decoration:none;">Albert Einstein</span>.</span></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Teori <span style="color:windowtext;text-decoration:none;">Kuantum</span></span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Teori ini di mulai pada abad ke-19 oleh <span style="color:windowtext;text-decoration:none;">Max Planck</span>, yang menyatakan pada tahun <span style="color:windowtext;text-decoration:none;">1900</span> bahwa sinar cahaya adalah terdiri dari paket (<span style="color:windowtext;text-decoration:none;">kuantum</span>) tenaga yang dikenal sebagai <span style="color:windowtext;text-decoration:none;">photon</span>. <span style="color:windowtext;text-decoration:none;">Penghargaan Nobel</span> menghadiahkan Planck anugerah fisika pada <span style="color:windowtext;text-decoration:none;">1918</span> untuk kerja-kerjanya dalam penemuan <span style="color:windowtext;text-decoration:none;">teori kuantum</span>, walaupun dia bukannya orang yang pertama memperkenalkan prinsip asas partikel cahaya.</span></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Teori Dualitas Partikel-Gelombang</span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Teori ini menggabungkan tiga teori yang sebelumnya, dan menyatakan bahwa cahaya adalah partikel dan gelombang. Ini adalah teori modern yang menjelaskan sifat-sifat cahaya, dan bahkan sifat-sifat partikel secara umum. Teori ini pertama kali dijelaskan oleh <span style="color:windowtext;text-decoration:none;">Albert Einstein</span> pada awal abad 20, berdasarkan dari karya tulisnya tentang <span style="color:windowtext;text-decoration:none;">efek fotolistrik</span>, dan hasil penelitian Planck. Einstein menunjukkan bahwa energi sebuah foton sebanding dengan frekuensinya. Lebih umum lagi, teori tersebut menjelaskan bahwa semua benda mempunyai sifat partikel dan gelombang, dan berbagai macam eksperimen dapat di lakukan untuk membuktikannya. Sifat partikel dapat lebih mudah dilihat apabila sebuah objek mempunyai massa yang besar.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Pada pada tahun 1924 eksperimen oleh <span style="color:windowtext;text-decoration:none;">Louis de Broglie</span> menunjukan <span style="color:windowtext;text-decoration:none;">elektron</span> juga mempunyai sifat dualitas partikel-gelombang. Einstein mendapatkan penghargaan Nobel pada tahun 1921 atas karyanya tentang dualitas partikel-gelombang pada foton, dan de Broglie mengikuti jejaknya pada tahun 1929 untuk partikel-partikel yang lain.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN"><br />
</span></p>
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<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:18pt;" lang="IN">Panjang Gelombang Tampak</span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Cahaya tampak adalah bagian spektrum yang mempunyai <span style="color:windowtext;text-decoration:none;">panjang gelombang</span> antara lebih kurang 400 <span style="color:windowtext;text-decoration:none;">nanometer</span> (<em>nm</em>) dan 800 nm (dalam <span style="color:windowtext;text-decoration:none;">udara</span>).</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><!--[if !mso]&gt; &lt;!  v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} --> <!--[endif]--><!--[if gte mso 9]&gt;  Normal 0 false    false false false  EN-US X-NONE X-NONE              MicrosoftInternetExplorer4              &lt;![endif]--><!--[if gte mso 9]&gt;                                                                                                                                            &lt;![endif]--><!--  /* Font Definitions */  @font-face 	{font-family:"Cambria Math"; 	panose-1:2 4 5 3 5 4 6 3 2 4; 	mso-font-charset:1; 	mso-generic-font-family:roman; 	mso-font-format:other; 	mso-font-pitch:variable; 	mso-font-signature:0 0 0 0 0 0;} @font-face 	{font-family:Calibri; 	panose-1:2 15 5 2 2 2 4 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:swiss; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1073750139 0 0 159 0;}  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-unhide:no; 	mso-style-qformat:yes; 	mso-style-parent:""; 	margin-top:0cm; 	margin-right:0cm; 	margin-bottom:10.0pt; 	margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	mso-bidi-font-size:11.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi; 	mso-ansi-language:IN;} .MsoChpDefault 	{mso-style-type:export-only; 	mso-default-props:yes; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;} .MsoPapDefault 	{mso-style-type:export-only; 	margin-bottom:10.0pt; 	line-height:115%;} @page Section1 	{size:612.0pt 792.0pt; 	margin:72.0pt 72.0pt 72.0pt 72.0pt; 	mso-header-margin:36.0pt; 	mso-footer-margin:36.0pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;} --><!--[if gte mso 10]&gt; &lt;!   /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Table Normal"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-priority:99; 	mso-style-qformat:yes; 	mso-style-parent:""; 	mso-padding-alt:0cm 5.4pt 0cm 5.4pt; 	mso-para-margin-top:0cm; 	mso-para-margin-right:0cm; 	mso-para-margin-bottom:10.0pt; 	mso-para-margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:11.0pt; 	font-family:"Calibri","sans-serif"; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:"Times New Roman"; 	mso-fareast-theme-font:minor-fareast; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin;} --> <!--[endif]--></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Rumus kecepatan-cahaya</span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;margin:0 0 .0001pt 36pt;"><em><span lang="IN">v</span></em><span lang="IN"> = λ<em>f</em>,</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Dimana <em>λ</em> adalah panjang gelombang, <em>f</em> adalah frekuensi, <em>v</em> adalah kecepatan cahaya. Kalau cahaya bergerak di dalam vakum, jadi <em>v</em> = <em>c</em>, jadi</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;margin:0 0 .0001pt 36pt;"><em><span lang="IN">c</span></em><span lang="IN"> = λ<em>f</em>,</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">di mana <em>c</em> adalah laju cahaya. Kita boleh menerangkan <em>v</em> sebagai</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN"><img class="aligncenter size-full wp-image-85" title="clip_image001" src="http://blogsplonkz.files.wordpress.com/2009/04/clip_image001.gif?w=390" alt="clip_image001"   /><br />
</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">di mana <em>n</em> adalah konstan (<span style="color:windowtext;text-decoration:none;">indeks biasan</span>) yang mana adalah sifat material yang dilalui oleh cahaya.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;">
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><!--[if gte mso 9]&gt;  Normal 0     false false false  EN-US X-NONE X-NONE              MicrosoftInternetExplorer4              &lt;![endif]--><!--[if gte mso 9]&gt;                                                                                                                                            &lt;![endif]--><!--  /* Font Definitions */  @font-face 	{font-family:"Cambria Math"; 	panose-1:2 4 5 3 5 4 6 3 2 4; 	mso-font-charset:1; 	mso-generic-font-family:roman; 	mso-font-format:other; 	mso-font-pitch:variable; 	mso-font-signature:0 0 0 0 0 0;} @font-face 	{font-family:Calibri; 	panose-1:2 15 5 2 2 2 4 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:swiss; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1073750139 0 0 159 0;}  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-unhide:no; 	mso-style-qformat:yes; 	mso-style-parent:""; 	margin-top:0cm; 	margin-right:0cm; 	margin-bottom:10.0pt; 	margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	mso-bidi-font-size:11.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi; 	mso-ansi-language:IN;} .MsoChpDefault 	{mso-style-type:export-only; 	mso-default-props:yes; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;} .MsoPapDefault 	{mso-style-type:export-only; 	margin-bottom:10.0pt; 	line-height:115%;} @page Section1 	{size:612.0pt 792.0pt; 	margin:72.0pt 72.0pt 72.0pt 72.0pt; 	mso-header-margin:36.0pt; 	mso-footer-margin:36.0pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;} --><!--[if gte mso 10]&gt; &lt;!   /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Table Normal"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-priority:99; 	mso-style-qformat:yes; 	mso-style-parent:""; 	mso-padding-alt:0cm 5.4pt 0cm 5.4pt; 	mso-para-margin-top:0cm; 	mso-para-margin-right:0cm; 	mso-para-margin-bottom:10.0pt; 	mso-para-margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:11.0pt; 	font-family:"Calibri","sans-serif"; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:"Times New Roman"; 	mso-fareast-theme-font:minor-fareast; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin;} --> <!--[endif]--></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:13.5pt;" lang="IN">Sejarah pengukuran kelajuan cahaya</span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Kelajuan cahaya telah sering diukur oleh ahli fisika. Pengukuran awal yang paling baik dilakukan oleh <span style="color:windowtext;text-decoration:none;">Olaus Roemer</span> (ahli fisika Denmark), dalam <span style="color:windowtext;text-decoration:none;">1676</span>. Beliau menciptakan kaedah mengukur kelajuan cahaya. Beliau mendapati dan telah mencatatkan pergerakan planet <span style="color:windowtext;text-decoration:none;">Saturnus</span> dan satu dari <span style="color:windowtext;text-decoration:none;">bulannya</span> dengan menggunakan <span style="color:windowtext;text-decoration:none;">teleskop</span>. Roomer mendapati bahwa bulan tersebut mengorbit Saturnus sekali setiap 42-1/2 <span style="color:windowtext;text-decoration:none;">jam</span>. Masalahnya adalah apabila Bumi dan Saturnus berjauhan, putaran orbit bulan tersebut kelihatan bertambah. Ini menunjukkan cahaya memerlukan waktu lebih lama untuk samapai ke Bumi. Dengan ini kelajuan cahaya dapat diperhitungkan dengan menganalisa jarak antara planet pada masa-masa tertentu. Roemer mendapatkan angka kelajuan cahaya sebesar 227,000 <span style="color:windowtext;text-decoration:none;">kilometer</span> per detik.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN"><span style="color:windowtext;text-decoration:none;">Mikel Giovanno Tupan</span> memperbaiki hasil kerja Roemer pada tahun <span style="color:windowtext;text-decoration:none;">2008</span>. Dia menggunakan <span style="color:windowtext;text-decoration:none;">cermin</span> berputar untuk mengukur <span style="color:windowtext;text-decoration:none;">waktu</span> yang diambil cahaya untuk bolak-balik dari Gunung Wilson ke Gunung San Antonio di <span style="color:windowtext;text-decoration:none;">California</span>. Ukuran jitu menghasilkan kelajuan 299,796 kilometer/detik. Dalam penggunaan sehari-hari, jumlah ini dibulatkan menjadi dan 300,000 kilometer/detik.</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN"><br />
</span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><!--[if gte mso 9]&gt;  Normal 0     false false false  EN-US X-NONE X-NONE              MicrosoftInternetExplorer4              &lt;![endif]--><!--[if gte mso 9]&gt;                                                                                                                                            &lt;![endif]--><!--  /* Font Definitions */  @font-face 	{font-family:"Cambria Math"; 	panose-1:2 4 5 3 5 4 6 3 2 4; 	mso-font-charset:1; 	mso-generic-font-family:roman; 	mso-font-format:other; 	mso-font-pitch:variable; 	mso-font-signature:0 0 0 0 0 0;} @font-face 	{font-family:Calibri; 	panose-1:2 15 5 2 2 2 4 3 2 4; 	mso-font-charset:0; 	mso-generic-font-family:swiss; 	mso-font-pitch:variable; 	mso-font-signature:-1610611985 1073750139 0 0 159 0;}  /* Style Definitions */  p.MsoNormal, li.MsoNormal, div.MsoNormal 	{mso-style-unhide:no; 	mso-style-qformat:yes; 	mso-style-parent:""; 	margin-top:0cm; 	margin-right:0cm; 	margin-bottom:10.0pt; 	margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:12.0pt; 	mso-bidi-font-size:11.0pt; 	font-family:"Times New Roman","serif"; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi; 	mso-ansi-language:IN;} .MsoChpDefault 	{mso-style-type:export-only; 	mso-default-props:yes; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:Calibri; 	mso-fareast-theme-font:minor-latin; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin; 	mso-bidi-font-family:"Times New Roman"; 	mso-bidi-theme-font:minor-bidi;} .MsoPapDefault 	{mso-style-type:export-only; 	margin-bottom:10.0pt; 	line-height:115%;} @page Section1 	{size:612.0pt 792.0pt; 	margin:72.0pt 72.0pt 72.0pt 72.0pt; 	mso-header-margin:36.0pt; 	mso-footer-margin:36.0pt; 	mso-paper-source:0;} div.Section1 	{page:Section1;} --><!--[if gte mso 10]&gt; &lt;!   /* Style Definitions */  table.MsoNormalTable 	{mso-style-name:"Table Normal"; 	mso-tstyle-rowband-size:0; 	mso-tstyle-colband-size:0; 	mso-style-noshow:yes; 	mso-style-priority:99; 	mso-style-qformat:yes; 	mso-style-parent:""; 	mso-padding-alt:0cm 5.4pt 0cm 5.4pt; 	mso-para-margin-top:0cm; 	mso-para-margin-right:0cm; 	mso-para-margin-bottom:10.0pt; 	mso-para-margin-left:0cm; 	line-height:115%; 	mso-pagination:widow-orphan; 	font-size:11.0pt; 	font-family:"Calibri","sans-serif"; 	mso-ascii-font-family:Calibri; 	mso-ascii-theme-font:minor-latin; 	mso-fareast-font-family:"Times New Roman"; 	mso-fareast-theme-font:minor-fareast; 	mso-hansi-font-family:Calibri; 	mso-hansi-theme-font:minor-latin;} --> <!--[endif]--></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><strong><span style="font-size:18pt;" lang="IN">Warna dan Panjang Gelombang</span></strong></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Panjang gelombang yang berbeda-beda diinterpretasikan oleh otak manusia sebagai <span style="color:windowtext;text-decoration:none;">warna</span>, dengan <span style="color:windowtext;text-decoration:none;">merah</span> adalah panjang gelombang terpanjang (frekuensi paling rendah) hingga ke <span style="color:windowtext;text-decoration:none;">ungu</span> dengan panjang gelombang terpendek (frekuensi paling tinggi). Cahaya dengan frekuensi di bawah 400 nm dan di atas 700 nm tidak dapat dilihat manusia. Cahaya disebut sebagai sinar<span style="color:windowtext;text-decoration:none;">ultraviolet</span> pada batas frekuensi tinggi dan <span style="color:windowtext;text-decoration:none;">inframerah</span> (IR atau infrared) pada batas frekuensi rendah. Walaupun manusia tidak dapat melihat sinar inframerah kulit manusia dapat merasakannya dalam bentuk panas. Ada juga camera yang dapat menangkap sinar Inframerah dan mengubahnya menjadi sinar tampak. Kamera seperti ini disebut <em><span style="color:windowtext;text-decoration:none;">night vision camera</span></em></span></p>
<p class="MsoNormal" style="line-height:normal;text-align:justify;"><span lang="IN">Radiasi ultaviolet tidak dirasakan sama sekali oleh manusia kecuali dalam jangka paparan yang lama, hall ini dapat menyebabkan kulit terbakar dan <span style="color:windowtext;text-decoration:none;">kanker kulit</span>. Beberapa hewan seperti <span style="color:windowtext;text-decoration:none;">lebah</span> dapat melihat sinar ultraviolet, sedangkan hewan-hewan lainnya seperti <span style="color:windowtext;text-decoration:none;">Ular</span> Viper dapat merasakan IR dengan organ khusus.</span></p>
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		<title>Tugas Mobil Bertemu 2</title>
		<link>http://blogsplonkz.wordpress.com/2009/03/30/tugas-mobil-bertemu-2/</link>
		<comments>http://blogsplonkz.wordpress.com/2009/03/30/tugas-mobil-bertemu-2/#comments</comments>
		<pubDate>Mon, 30 Mar 2009 11:15:49 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Contoh Soal]]></category>
		<category><![CDATA[Dinamika]]></category>
		<category><![CDATA[Mobil Bertemu 2]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=76</guid>
		<description><![CDATA[Penyelesaian: s = sA &#8211; sB s = (VoA + ½ aA.t2) &#8211; (VoB + ½ aB.t2) s = (VoA &#8211; VoB)t + ½ (aA &#8211; aB)t2 ½ (aA &#8211; aB)t2 + (VoA &#8211; VoB)t – s = 0 x 2 (aA - aB)t2 + 2(VoA &#8211; VoB)t – 2s = 0 berdasarkan rumus Vt2 [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=76&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><img class="alignnone size-full wp-image-75" title="mobil-searah12" src="http://blogsplonkz.files.wordpress.com/2009/03/mobil-searah12.jpg?w=390" alt="mobil-searah12"   /></p>
<p><span id="more-76"></span></p>
<p>Penyelesaian:</p>
<p class="MsoListParagraphCxSpFirst" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">s = s<sub>A</sub> &#8211; s<sub>B</sub> </span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">s = (Vo<sub>A</sub> + ½ a<sub>A</sub>.t<sup>2</sup>) &#8211; (Vo<sub>B</sub> + ½ a<sub>B</sub>.t<sup>2</sup>)</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">s = (Vo<sub>A</sub> &#8211; Vo<sub>B</sub>)t + ½ (a<sub>A</sub> &#8211; a<sub>B</sub>)t<sup>2</sup></span></p>
<p class="MsoListParagraphCxSpLast" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">½ (a<sub>A</sub> &#8211; a<sub>B</sub>)t<sup>2</sup> + (Vo<sub>A</sub> &#8211; Vo<sub>B</sub>)t – s = 0<span> </span>x 2</span></p>
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;"><span style="font-size:16pt;line-height:115%;" lang="IN">(a<sub>A </sub>- a<sub>B</sub>)t<sup>2</sup> + 2(Vo<sub>A</sub> &#8211; Vo<sub>B</sub>)t – 2s = 0</span></p>
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;"><span style="font-size:16pt;line-height:115%;" lang="IN"><img class="alignnone size-full wp-image-77" title="t12-no2" src="http://blogsplonkz.files.wordpress.com/2009/03/t12-no2.jpg?w=390&#038;h=56" alt="t12-no2" width="390" height="56" /></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;"><span style="font-size:14pt;line-height:115%;" lang="IN">berdasarkan rumus Vt<sup>2</sup> = Vo<sup>2</sup> + 2.a.s, maka :</span></p>
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;"><span style="font-size:14pt;line-height:115%;" lang="IN"><img class="alignnone size-full wp-image-78" title="as2" src="http://blogsplonkz.files.wordpress.com/2009/03/as2.jpg?w=390" alt="as2"   /></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;"><span style="font-size:14pt;line-height:115%;" lang="IN"><img class="alignnone size-full wp-image-79" title="t12-no2-baru" src="http://blogsplonkz.files.wordpress.com/2009/03/t12-no2-baru.jpg?w=390" alt="t12-no2-baru"   /></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;">
<p class="MsoNormal" style="margin-left:.5in;text-align:justify;"><span style="font-size:14pt;line-height:115%;" lang="IN"><img class="alignnone size-full wp-image-80" title="t2-no-2" src="http://blogsplonkz.files.wordpress.com/2009/03/t2-no-2.jpg?w=390&#038;h=211" alt="t2-no-2" width="390" height="211" /><br />
</span></p>
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		<title>Tugas Mobil Bertemu</title>
		<link>http://blogsplonkz.wordpress.com/2009/03/30/tugas-mobil-bertemu/</link>
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		<pubDate>Mon, 30 Mar 2009 10:58:16 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>

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		<description><![CDATA[s = sA + sB s = (VoA + ½ aA.t2) + (VoB + ½ aB.t2) s = (VoA + VoB)t + ½ (aA + aB)t2 ½ (aA + aB)t2 + (VoA + VoB)t – s = 0 x 2 (aA + aB)t2 + 2(VoA + VoB)t – 2s = 0 berdasarkan rumus Vt2 = [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=73&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><img class="alignnone size-full wp-image-68" title="mobil-berlawanan-arah" src="http://blogsplonkz.files.wordpress.com/2009/03/mobil-berlawanan-arah.jpg?w=390&#038;h=215" alt="mobil-berlawanan-arah" width="390" height="215" /></p>
<p><span id="more-73"></span></p>
<p class="MsoListParagraphCxSpFirst" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">s = s<sub>A</sub> + s<sub>B</sub> </span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">s = (Vo<sub>A</sub> + ½ a<sub>A</sub>.t<sup>2</sup>) + (Vo<sub>B</sub> + ½ a<sub>B</sub>.t<sup>2</sup>)</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">s = (Vo<sub>A</sub> + Vo<sub>B</sub>)t + ½ (a<sub>A</sub> + a<sub>B</sub>)t<sup>2</sup></span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">½ (a<sub>A</sub> + a<sub>B</sub>)t<sup>2</sup> + (Vo<sub>A</sub> + Vo<sub>B</sub>)t – s = 0<span> </span>x 2</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN">(a<sub>A </sub>+ a<sub>B</sub>)t<sup>2</sup> + 2(Vo<sub>A</sub> + Vo<sub>B</sub>)t – 2s = 0</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:16pt;line-height:150%;" lang="IN"><img class="alignnone size-full wp-image-67" title="t12" src="http://blogsplonkz.files.wordpress.com/2009/03/t12.jpg?w=390&#038;h=67" alt="t12" width="390" height="67" /></span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;" lang="IN">berdasarkan rumus Vt<sup>2</sup> = Vo<sup>2</sup> + 2.a.s, maka :</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;" lang="IN"><img class="alignnone size-full wp-image-66" title="as1" src="http://blogsplonkz.files.wordpress.com/2009/03/as1.jpg?w=390" alt="as1"   /></span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;" lang="IN"><img class="alignnone size-full wp-image-69" title="t1" src="http://blogsplonkz.files.wordpress.com/2009/03/t1.jpg?w=390&#038;h=291" alt="t1" width="390" height="291" /></span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;">
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;" lang="IN"><img class="alignnone size-full wp-image-70" title="t2-no1" src="http://blogsplonkz.files.wordpress.com/2009/03/t2-no1.jpg?w=390&#038;h=249" alt="t2-no1" width="390" height="249" /><br />
</span></p>
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		<title>Tugas dari Grafik</title>
		<link>http://blogsplonkz.wordpress.com/2009/03/30/tugas-dari-grafik/</link>
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		<pubDate>Mon, 30 Mar 2009 10:48:11 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Fisika Dasar]]></category>
		<category><![CDATA[Contoh Soal]]></category>
		<category><![CDATA[Dinamika]]></category>
		<category><![CDATA[grafik]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/?p=71</guid>
		<description><![CDATA[Jika diketahui grafik hubungan kecepatan (v) dan waktu (s) seperti di bawah ini, hitunglah: Panjang lintasan saat 5 detik pertama? b. Percepatan dari detik 0 sampai detik 1? c. Percepatan dari detik ke-4 sampai detik ke-5? n panjang lintasan (s) saat detik ke: 0 – 1 : s = ½ t (vt + vo) =&#62; [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=71&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><span style="font-size:12pt;line-height:115%;">Jika diketahui grafik hubungan kecepatan (v) dan waktu (s) seperti di bawah ini, hitunglah:</span></p>
<p style="text-align:center;"><img class="size-full wp-image-64 aligncenter" title="gambar-fisdas" src="http://blogsplonkz.files.wordpress.com/2009/03/gambar-fisdas.jpg?w=390&#038;h=265" alt="gambar-fisdas" width="390" height="265" /></p>
<p style="text-align:center;"><span id="more-71"></span></p>
<p>Panjang lintasan saat 5 detik pertama?</p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;"><!--[if !supportLists]--><span style="font-size:12pt;line-height:115%;"><span><span> </span></span></span><!--[endif]--><span style="font-size:12pt;line-height:115%;">b. Percepatan dari detik 0 sampai detik 1?</span></p>
<p class="MsoListParagraphCxSpLast" style="text-indent:-.25in;"><!--[if !supportLists]--><span style="font-size:12pt;line-height:115%;"><span><span> </span></span></span><!--[endif]--><span style="font-size:12pt;line-height:115%;">c. Percepatan dari detik ke-4 sampai detik ke-5?</span></p>
<p class="MsoListParagraphCxSpLast" style="text-indent:-.25in;">
<p class="MsoListParagraphCxSpFirst" style="text-indent:-.25in;line-height:150%;"><span style="font-size:12pt;line-height:150%;">n   panjang lintasan (s) saat detik ke:</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;">0 – 1 <span> </span></span><span style="font-size:12pt;line-height:150%;">:<span> </span></span><span style="font-size:14pt;line-height:150%;">s = ½ t (v<sub>t</sub> + v<sub>o</sub>)<span> </span>=&gt;<span> </span>s = ½ . 1 (80 + 40)<span> </span> =&gt;<span> </span><span> </span>s = <span> </span>60 satuan</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;">1 – 4<span> </span>:<span> </span>s = ½ t (v<sub>t </sub>+ v<sub>o</sub>)<span> </span>=&gt;<span> </span>s = ½ . 3 (80 + 80)<span> </span>=&gt;<span> </span>s = 240 satuan</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:14pt;line-height:150%;">4 – 5<span> </span>:<span> </span>s = ½ t (v<sub>t</sub> +v<sub>o</sub>)<span> </span>=&gt;<span> </span>s = ½ . 1 (20 + 80)<span> </span>=&gt;<span> </span>s =<span> </span>50 satuan</span></p>
<p class="MsoListParagraphCxSpMiddle" style="line-height:150%;"><span style="font-size:12pt;line-height:150%;">Panjang</span><span style="font-size:14pt;line-height:150%;"> </span><span style="font-size:12pt;line-height:150%;">lintasan saat 5 detik pertama adalah </span><span style="font-size:14pt;line-height:150%;">60 + 240 + 50 = 350 satuan.<span> </span></span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;line-height:150%;"><!--[if !supportLists]--><span style="font-size:12pt;line-height:150%;"><span>b)<span> </span></span></span><!--[endif]--><span style="font-size:12pt;line-height:150%;">Percepatan dari detik 0 sampai detik 1:</span></p>
<p class="MsoListParagraphCxSpLast" style="text-indent:-.25in;text-align:center;"><span style="font-size:12pt;line-height:115%;"><img class="size-full wp-image-65 aligncenter" title="percepatan-1" src="http://blogsplonkz.files.wordpress.com/2009/03/percepatan-1.jpg?w=390" alt="percepatan-1"   /></span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;line-height:150%;"><span style="font-size:12pt;line-height:150%;"> Percepatan dari detik ke-4 sampai detik ke-5:</span></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;line-height:150%;text-align:center;"><img class="size-full wp-image-63 aligncenter" title="percepatan-21" src="http://blogsplonkz.files.wordpress.com/2009/03/percepatan-21.jpg?w=390&#038;h=97" alt="percepatan-21" width="390" height="97" /></p>
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		<title>Akhirnya KELAR&#8230;..!!!</title>
		<link>http://blogsplonkz.wordpress.com/2009/03/19/akhirnya-kelar/</link>
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		<pubDate>Thu, 19 Mar 2009 12:42:47 +0000</pubDate>
		<dc:creator>blogsplonkz</dc:creator>
				<category><![CDATA[Cerita Cuap-Cuap]]></category>

		<guid isPermaLink="false">http://blogsplonkz.wordpress.com/2009/03/19/akhirnya-kelar/</guid>
		<description><![CDATA[Dari judul diatas gue ngerasa sangat happy bnget, kerjaan kepanitian gue berjalan dengan lancar. Meski waktu yang diberikan itu cuma 2 minggu, tapi akhirnya berjalan dengan cukup lancar. Tapi 1 yang jadi masalah, masalah peserta yg cuman dkit bnget datang. Padahal udah gue pasang pengumuman buat datang di acaranya. Tapi ya sutralah, acara udah kelar, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=blogsplonkz.wordpress.com&amp;blog=6834107&amp;post=62&amp;subd=blogsplonkz&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Dari judul diatas gue ngerasa sangat happy bnget, kerjaan kepanitian gue berjalan dengan lancar. Meski waktu yang diberikan itu cuma 2 minggu, tapi akhirnya berjalan dengan cukup  lancar. Tapi 1 yang jadi masalah, masalah peserta yg cuman dkit bnget datang.</p>
<p>Padahal udah gue pasang pengumuman buat datang di acaranya. Tapi ya sutralah, acara udah kelar, karang tinggal tugas2 yang udah numpuk di depan pucuk hidung gue. Liburan ni kayaknya ga bisa bkin gue tenang2, Kalkulus bikin soal2, Acc Sisdig yang belum jelas batang hidungnya, sama UTS MAtdis yang diganti ma presentasi.</p>
<p>Semoga ja dweh, gue bisa ngejalanin nie semua dengan selamat tanpa cacat sedikitpun. ewhaeh^^</p>
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