Question

A ray of light is incident normally on a face of an equilateral prism. The ray gets totally reflected at the second refracting surface. The total deviation produced in the path of the ray is ______.

Options

• 30°

• 60°

• 90°

• 120°

Answer 1

A ray of light is incident normally on a face of an equilateral prism. The ray gets totally reflected at the second refracting surface. The total deviation produced in the path of the ray is 60°.

Explanation:

The total deviation is the angle between the extended incident ray and the emergent ray, measuring 60 degrees.