Laser Tracking on the CD Scaled Views of a Compact Disc
Laser Tracking on the CD Scaled Views of a Compact Disc
Laser Tracking on the CD Scaled Views of a Compact Disc
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which applies to both <strong>the</strong> parallel and perpendicular cases.<br />
Parallel case: Reflected % and transmitted %.<br />
Perpendicular case: Reflected % and transmitted %.<br />
Reflecti<strong>on</strong> and Transmissi<strong>on</strong><br />
Internal Reflecti<strong>on</strong><br />
Fresnel's equati<strong>on</strong>s describe <strong>the</strong> reflecti<strong>on</strong> and transmissi<strong>on</strong> <strong>of</strong> electromagnetic waves at an<br />
interface. That is, <strong>the</strong>y give <strong>the</strong> reflecti<strong>on</strong> and transmissi<strong>on</strong> coefficients for waves parallel and<br />
perpendicular to <strong>the</strong> plane <strong>of</strong> incidence. For a dielectric medium where Snell's Law can be used to<br />
relate <strong>the</strong> incident and transmitted angles, Fresnel's Equati<strong>on</strong>s can be stated in terms <strong>of</strong> <strong>the</strong> angles <strong>of</strong><br />
incidence and transmissi<strong>on</strong>.<br />
For light from a medium <strong>of</strong> index =<br />
incident up<strong>on</strong> a medium <strong>of</strong> index =<br />
at an angle = °<br />
<strong>the</strong> angle <strong>of</strong> transmissi<strong>on</strong> is = °<br />
Fresnel's equati<strong>on</strong>s give <strong>the</strong> reflecti<strong>on</strong> coefficients: