A parallel beam of light is incident from air at an angle α on the side PQ of a right angled triangular prism of refractive index n = \sqrt2 . Light undergoes total internal reflection in the prism at the face PR when α has a minimum value of 45°. The angle θ of the prism is: [JEE Adv 2016 P1]

JEE Advanced 2016 Paper 1

Section: Physics

Question : 1 of 54

Marks: +1, -0

A parallel beam of light is incident from air at an angle α 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 α has a minimum value of 45°. The angle θ of the prism is:

[JEE Adv 2016 P1]

15°
22.5°
30°
45°

Validate

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