Question

The angle between the incident ray and the normal at the point of incidence is known as the angle of ___________.

Answer 1

1. The ray of light that strikes the surface is termed an incident ray and the ray that bounces back is termed a reflected ray.
2. The point at which the ray of light is incident is called a point of incidence. And the perpendicular drawn at the point of incidence is called normal.
3. The angle between the incident ray and the normal is called the angle of incidence.
4. The angle between the reflected ray and the normal is called the angle of reflection.

Hence, the angle between the incident ray and the normal at the point of incidence is known as the angle of incidence.