Terms used in reflection of light.
Incident ray: The ray of light that falls on the surface of the reflection materials. In figure, PO is the incident ray.
Reflected ray: The ray of light that comes from the point when the incident ray falls on the reflection material. In the figure, OQ is the reflected ray.
Point of incidence : The point of which are incident ray strikes the reflecting surface is the point of incidence. In the figure ‘O‘ point of incidence.
Normal : The perpendicular line drawn from the point of incidence to the plane of reflecting surface is called normal. In figure, ON is the normal.
Angle of incidence: The angle formed between the incident ray PO and the normal ‘ON’ is angle of incidence. It is denoted by ∟i
Angle of reflection: The angle formed between the reflected ray OQ and the normal ON is angle of reflection. It is denoted by ∟i