Question

What is meant by the reflection of light? Define the following terms used in the study of reflection of light by drawing a labelled diagram
(A) Incident ray
(B) Point of Incidence
(C) Normal
(D) Reflected ray
(E) Angle of incidence
(F) Angle of reflection

Answer 1

Hint: The law of reflection specifies that the angle of incidence is equal to the angle of reflection when a ray of light reflects off a surface. For rough surfaces as well, the law of reflection holds true. The law of reflection also states that at the point of incidence,' the incident ray, the reflected ray and the normal to the reflecting surface lie in the same plane.'

Complete Step-by-Step solution:

Incident Ray: The light ray of light which falls on the surface is called the incident ray. In the above figure, the incident ray has been marked with arrow marks.
Point of Incidence: The point at which the incident ray of lights strikes the surface is called the point of incidence. In the figure above, the point of incidence is represented by $ O $ .
Normal: A normal ray is a ray that is incident to a surface at $ 90 $ degrees. That is, to the surface, the light ray is perpendicular or normal. And it is called Normal ray.
Reflected ray: The ray of light which is sent back by the mirror from the point of incidence is called reflected ray.
Angle of incidence: Angle of incidence is the angle which the incident light ray makes with a normal to the surface. In the figure above, the angle of incidence is $ i $ .
Angle of reflection: Angle of reflection is the angle which the reflected light ray makes with a normal to the surface. In the figure above, the angle of incidence is $ r $ .

Note:
The reflection of light off a mirror's shiny surface is the most common example of the reflection of light in real life. Multiple laws of reflection are further elaborated. The light ray reflects off the mirror as a ray of light strikes a plane mirror. A shift in the direction of the light ray is involved in reflection.