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lec18 - Law of Refraction for Light(Snell’s 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 θ 1 λ 2 λ medium 2 medium 1 1 1 f v λ = 2 2 f v λ = Normal 2 1 2 1 v v sin sin = θ θ
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