Question

A light ray is incident on a plane mirror making an angle of 45o with respect to the surface of the mirror. What is the value of the angle between incident ray and reflected ray?

Answer 1

the angle between incident ray and the surface= 45°
angle of Incidence = 90-45
=45°
angle of Reflection = 45°

Hence the angle between incident ray and the reflected ray =45 +45 = 90°

Answer 2

Given 
 Angle of incident ray is 45
angle of incident ray equal to angle  reflected ray so, ∴ reflected ray is 45°..