When a light ray approaches a smooth polished surface and the light ray bounces back at the same angle from the normal, then it is called ‘Reflection of light’.
According to law of reflection
Angle of incidence is equal to angle of reflection.
Incidence ray, reflected ray and normal must be in the same plane.
Angle of incident ray and angle of reflected ray are measured from the normal.
Final answer
Hence, the reflection is the phenomenon in which light rays bounces back to the same angle from the normal. Law of reflection says incident angle and reflected angle are equal in magnitude.