Question

A ray of light strikes a parabolic mirror, the angle of incidence if the angle of reflecttion is ${80}^{\circ }$ is

• A. ${40}^{\circ }$
• B. ${80}^{\circ }$
• C. ${160}^{\circ }$

Answer 1

The correct option is B ${80}^{\circ }$

When a ray of light strikes a parabolic mirror then the angle of incidence of ray of light is equal to reflected ray of light.

Given angle of reflection as ${80}^{\circ }$
So, the value of angle of incidence will be same as reflection i.e. ${80}^{\circ }.$