Question

What happens when a ray of light is made to fall on a mirror along the normal?

• A. The ray that comes after reflection makes ${60}^{\circ }$ with the mirror.
• B. The ray that comes after reflection will be parallel to the mirror.
• C. The ray after reflection retraces its path.
• D. After reflection, the ray does not come back.

Answer 1

The correct option is C The ray after reflection retraces its path.

When, a ray is incident along normal to a mirror, angle of incidence $i=0^o$

And according of Law of Reflection, angle of reflection, $r=i=0^o$

And, angle of incidence and reflection are angles from normal.

Hence, reflected ray is also along normal that is ray is reflected along the same path.

Answer-(C)