Question

What happens when a ray of light falls normally (or perpendicularly) on the surface of the mirror?

• A. Travels away from normal.
• B. It passes through focus after reflection.
• C. It reflects towards the pole of the mirror
• D. It is reflected back along the normal.

Answer 1

The correct option is D It is reflected back along the normal.

If a ray of light is incident normally on a mirror, it means that it is travelling along the normal to the mirror. So, the angle of incidence of light is 0 degree. Then, by the laws of reflection, angle of reflection is also 0 degree. The light ray is reflected back along the normal.