Question

The following diagram shows a 60°,30°,90° glass prism of critical angle 42°.Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface

Answer 1

Explanation:

ANSWER

Critical angle of the prism is 42

o

.

The ray AB is incident on the face XY at an incidence angle 30

o

which is smaller than critical angle of prism. So, the ray refracts at the face XY and emerges away from normal N as shown in the figure.