Question

A ray of light makes an angle of 50°with the surface S 1 of the glass slab . It's angle of incidence will be ________
A. 50°
B. 40°
C. 140°
D. 0°

Answer 1

i think 40 degree would be the answer.....

Answer 2

Answer:

(B). The incidence angle will be 40°.

Explanation:

Given that,

A light ray makes an angle of 50° with the surface S₁ of the glass slab.

We know that,

The incidence angle makes between the incidence ray and normal line.

So, The angle of incidence will be 40°.

Hence, The incidence angle will be 40°.