A ray of light is incident at a small angle on the surface of a prism of small angle…

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A ray of light is incident at a small angle

i

on the surface of a prism of small angle

A

and emerges normally from the opposite surface. If the refractive index of the material of the prism is

\mu

, the angle of incidence is nearly equal to (1)

\frac{A}{\mu}

(2)

\frac{A}{2\mu}

(3)

\mu A

(4)

\frac{\mu A}{2}