Question

The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and the reflected ray will be: 

A. 30° 

B. 60° 

C. 90° 

D. 120°

Answer 1

A. 30° 

The angle between the incident ray and the mirror is 30 degrees.

Angle of incidence = angle of reflection. 

90 degrees is going directly into the mirror.

So, 90 – 30 = 60 degrees. 

The total angle between the incident ray and the reflected ray will be 120 degree.