  Question

# What is meant by 'reflection of light'? Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram : (a) Incident ray (b) Reflected ray (c) Point of incidence (d) Normal (e) Angle of incidence (f) Angle of reflection

Solution

## Bouncing back of a light ray after hitting any surface is known as reflection. Definitions: a) Incident ray:  The ray of light which falls on the surface is called incident ray. b) Reflected ray:  The ray of light which is sent back by the reflecting surface is called reflected ray. c) Point of incidence: The point where the incident ray strikes the surface is known as point of incidence. d) Normal: The perpendicular line drawn onto the surface at the point of incidence is called normal. e) Angle of incidence: The angle made by the incident ray with the normal at the point of incidence is called angle of incidence. f) Angle of reflection: The angle made by the reflected ray with the normal at the point of incidence is called angle of reflection.  Suggest corrections   