Reflection_Refraction_3.pdf - REFLECTION AND REFRACTION Consider the Snell’s Law of Refraction k1 sin θi = k2 sin θt If μ1 = μ 2 = μ 0(the two

Reflection_Refraction_3.pdf - REFLECTION AND REFRACTION...

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REFLECTION AND REFRACTION Consider the Snell’s Law of Refraction: 1 2 sin sin i t k k θ θ = If 1 2 0 μ μ μ = = (the two media are non-magnetic) 1 2 sin sin t i ε θ θ ε = , 1 2 1 2 n ε ε = 1 Consider two cases of interest: i) If 2 ε ε > , then 1 2 1 2 1 ε ε < and sin sin t i t i θ θ θ θ < < The wave is bent towards the normal in the denser medium. This is true also for the case 1 2 μ μ . The relevant condition in this case is 2 2 1 1 ε μ ε μ > . Critical Angle (Total Internal Reflection) incident wave z x y refracted (transmitted) wave ε 2 θ t θ i
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