lec18 - Law of Refraction for Light (Snells Law ) v c n = =...

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Refraction of Waves When a wave arrives at a boundary between two media, fraction of its energy is reflected, remaining fraction is transmitted across the boundary. Refraction occurs because the transmitted wave has different speed ( but same frequency ) as the incident wave. Law of Refraction 1 θ 2 1 λ 2 medium 2 medium 1 1 1 f v = 2 2 f v = Normal 2 1 2 1 v v sin sin =
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The Refraction of Light Speed of light in a transparent medium is less the speed of light in vacuum. Define Index of Refraction (n) of a transparent medium
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Unformatted text preview: Law of Refraction for Light (Snells Law ) v c n = = medium in light of speed vacuum in light of speed 2 2 1 1 sin sin n n = Incident medium has a larger index of refraction , ( n 1 >n 2 ) the refracted ray bend away from the normal. 1 2 ) ( 2 1 n n < 2 n fast slow Incident medium has a smaller index of refraction , ( n 1 <n 2 ) the refracted ray bend toward the normal. 1 2 fast slow ) ( 2 1 n n > 2 n...
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lec18 - Law of Refraction for Light (Snells Law ) v c n = =...

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