What is reflection of light ? Explain laws of reflection

Explanation

The phenomenon in which the light incident on opaque and shining surface and returns back from that surface is called reflection of light.

In figure, AB is incident ray, B is incidence point and BC is reflected ray and `bar(BN)` is normal to the surface.
Angle of reflection r or `theta` : The angle between reflected ray and the normal to the reflecting surface.
Angle of incidence i or `theta`: The angle between incident ray and the normal to the reflecting surface at the point of incidence lie in the same plane.
Laws of reflection :
(1) Incidence angle and reflection angle are same. [`therefore` i = r]
(2) The incident ray, reflected ray and the normal to the reflecting surface at the point of incidence lie in the same plane shown in the figure abcd.
(3) These laws are valid at each point on any reflecting surface whether plane or curved.
These laws are valid at each point on any reflecting surface whether plane or curved.