REFLECTION OF LIGHT

 When light falls on highly polished opaque object  like mirror, it will bounce back most of the light falling on it. This bouncing back of light is known as reflection of light


IMPORTANT TERMINOLOGIES USED TO EXPLAIN REFLECTION OF LIGHT


Incident ray

The ray of light falls on a reflecting surface from a light source is known as incident ray. 

Reflected ray

The ray of light that bounces back from the reflecting surface is known as reflected ray.

Normal

An imaginary line drawn perpendicular to the reflecting surface to the point of incidence is known as normal.

Angle of incidence (i)

The angle made by the incident ray and the normal is called as angle of incidence.

Angle of reflection (r)

The angle made by the reflected ray and the normal is called as angle of reflection 

LAWS OF REFLECTION 

The laws of reflection state that 
1) The angle of incidence (i) is always equal to the angle of reflection (r). i = r
2) The incidence ray, reflected ray and normal drawn to the point of incidence, all lie in a same plane.

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