Question

3. A ray of light travelling in air is incident on a face of
a rectangular slab and comes out from the opposite
face. The angle between the incident ray and the
normal to the surface is 30°. What is the angle
between the ray coming out of the slab and the
normal to the face from which it comes out?​

Answer 1

Answer:

answer is 30°

Explanation:

angle of incidence =30°

since angle of incidence is equal to angle of refraction.

therefore ,

angle of refraction = 30°