Question

what is the refractive angle when light passes from denser to rarer medium with critical angle?​

Answer 1

Answer:

The refractive angle is 90°

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Answer 2

Critical angle is the angle of incidence for which the angle of refraction is 2π for a given pair of media. Let θ be the angle of incidence and ϕ the angle of refraction. When the ray passes from denser to rarer medium, the deviation is δ=ϕ−θ. If θ=C then ϕ=2π and deviation δ=2π−C.

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