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A ray of light passes through a plane bo...

A ray of light passes through a plane boundary separating two media whose refractive indics are `mu_(1) = 3//2` and `mu_(2) = 4//3`. (i) If the ray travels from medium 1 to medium 2 at an angle of incidence of `30^(@)`, what is the angle of refraction ? (ii) If the ray travels form medium 2 to medium 1 at the same angle of incidence, what is the angle of refraction ?

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