Question

A parallel beam of light is incident from air at an angle ???? on the side PQ of a right angled triangular prism
of refractive index n = √2 . Light undergoes total internal reflection in the prism at the face PR when ????
has a minimum value of 45⁰. The angle θ of the prism is
(A) 15⁰
(B) 22.5⁰
(C) 30⁰
(D) 45⁰

Answer 1

Answer:

Option (D) is the correct answer.

Explanation:

A parallel beam of light is incident from the air at an angle α on the side of a right angled triangular prism of refractive index n=√2. Light undergoes total internal reflection in the prism at the face PR when α has a minimum value of 45∘.

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