Question

A beam of light enters an equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true?

Options

• incident ray is horizontal

• refracted ray is horizontal

• emergent ray is horizontal

• either refracted or emergent ray is horizontal.

Answer 1

refracted ray is horizontal.

Explanation:

In minimum deviation position refracted ray inside the prism is parallel to the base of the prism