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 45°. The angle  of the prism is

Answer 1

Answer:

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

Answer 2

Answer:

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