A ray of light strikes a plane mirror perpendicular to the mirror. What is the angle of incidence?
A) 360°
B) 0°
C) 180°
D) 90°
E) 270°

Question

Quizplus · Accepted Answer

When a ray of light strikes a plane mirror perpendicular to the mirror, the angle of incidence is 0 degrees. This is because the normal to the mirror is perpendicular to the mirror's surface, and the angle of incidence is measured between the incident ray and the normal.

A Ray of Light Strikes a Plane Mirror Perpendicular to the Mirror