A ray of light is incident at an angle of incidence i on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is μ, the angle of incidence i is nearly equal to

Question

Dr. Abubacker · Accepted Answer

[Solution from source] Normal emergence means r₂ = 0, so r₁ = A − r₂ = A. Snell's law at the first face: sin i = μ sin A. For small angles, i ≈ μA. A/μ would come from inverting Snell's law. Answer (2).

Q. A ray of light is incident at an angle of incidence i on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is μ, the angle of incidence i is nearly equal to

Explanation

Reviewed by Dr. Abubacker

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