88 lines
2.8 KiB
HTML
88 lines
2.8 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type"
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content="text/html; charset=ISO-8859-1">
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<meta name="GENERATOR"
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content="Mozilla/4.7 [en] (X11; U; OSF1 V4.0 alpha) [Netscape]">
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<meta name="Author" content="C. L. Davis">
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<title>Light and Optics - Apparent Depth - Physics 299</title>
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</head>
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<body style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"
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alink="#ff0000" link="#0000ee" vlink="#551a8b">
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<center>
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<h1><img src="ULPhys1.gif" align="texttop" height="50" width="189"></h1>
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</center>
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<center>
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<h1>Apparent Depth and Distortion</h1>
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</center>
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<center><img src="celticbar.gif" height="22" width="576">
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<br>
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<br>
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<font color="#ff0000"><i>"Give me but one firm spot on which to stand,
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and
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I will move the earth"</i></font><br>
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Archimedes<br>
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</center>
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<img src="netbar.gif" align="middle" height="40" width="100%">
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<br>
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<br>
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<ul>
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<li>The depth of a swimming pool always <i>appears</i> to be less
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than it actually is. This effect is due to the refraction of
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light rays as they traverse the boundary between water and air. </li>
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<br>
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<li>In the following graphic, the chest appears to be closer to the
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surface than it actually is. <br>
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<div align="center"><img src="lo_apparentdepth.jpg"
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alt="Apparent depth" align="middle" height="291" width="480"> </div>
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</li>
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<br>
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<li>By using Snell's law and simple geometry it can be shown that<br>
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<br>
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<center><b><img alt="" src="lo_appdepth_eqn1.gif"
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style="width: 389px; height: 116px;"><br>
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</b></center>
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</li>
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<br>
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<li>Spearfishing is particularly difficult due to the apparent depth
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phenomenon !!<br>
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<div align="center"><img src="lo_spearfishing.jpg"
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alt="Spear fishhing" align="middle" height="290" width="389"> <br>
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<div align="left"><br>
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<br>
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</div>
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</div>
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</li>
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<li>The discontinuous bending of a stick held partly in and partly
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out of water is also a result of light refraction at the air-water
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interface.</li>
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</ul>
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<div align="center"><img src="lo_BentStick.jpg" alt="Bent stick"
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align="middle" height="199" width="202">
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<br>
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</div>
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<img src="netbar.gif" height="40" width="100%">
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<center><span style="font-style: italic; color: rgb(255, 0, 0);">"Physics
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is
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like sex: sure, it may give some practical results, but that's</span><span
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style="font-size: 12pt; font-family: "Times New Roman";"><span
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style="font-style: italic; color: rgb(255, 0, 0);"> not why we do it."</span><br>
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Richard Feynman.</span><br>
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<br>
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<img src="celticbar.gif" height="22" width="576"><br>
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<p><i>Dr. C. L. Davis</i><br>
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<i>Physics Department</i><br>
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<i>University of Louisville</i><br>
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<i>email</i>: <a href="mailto:c.l.davis@louisville.edu">c.l.davis@louisville.edu</a>
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<br>
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</p>
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<p><img src="header-index.gif" height="51" width="92">
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</p>
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</center>
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<p><br>
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</p>
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</body>
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</html>
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