Question

The perpendicular to the mirror at point of incidence is called ........​

Answer 1

normal...............

Answer 2

Answer- NORMAL. The perpendicular to the mirror at the point of incidence is called 'Normal'. The point of incidence makes an angle with this perpendicular and this angle is called angle of incidence.

Whenever a ray strikes the surface of a mirror it reflects after striking at the point of incidence and a 'normal' plays an important role in the reflection of light.