Question

A light ray is incident on a smooth surface at an angle ${45}^{\circ }$ with the normal to the surface. Find the angle made by the reflected ray with the incident ray.
[2 MARKS]

Answer 1

Diagram: 1 Mark
Explanation: 1 Mark

Law of reflection states that the angle of incidence is equal to the angle of reflection.

So, the reflected ray makes same angle of ${45}^{\circ }$ with the normal.

Thus, the reflected ray makes ${90}^{\circ }$ with the incident ray.