Question

A parallel beam of light is incident from air at an angle alpha 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 alpha has a minimum value of 45°. the angle thitha of the prism is

Answer 1

Please find the answer below:

Keeping in view that; a parallel beam of light is incident from air at an angle a 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 a has a minimum value of 45°.

The angle θ of the prism would be 15°.

Answer 2

Explanation:

A parallel beam of light is incident from air at an angle a on the side ... In Δ AMB, 90° + θ + r1 + (90° – C) = 180° (From fig.) This discussion on A parallel beam of light is incident from air at an angle a 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°.