Question

If rays of light are incident on P1 such that all the rays are parallel to CP1, at which point will the light rays converge?

• A. At F1 only.
• B. At F2 only.
• C. At a point between F1 and F3.
• D. At a point between C and F3.

Answer 1

The correct option is A

At F1 only.

If the mirror were whole and complete then the image of an object at infinity will be at the focus (f).

For the mirror P1, the line CF1 will be the principal axis. All the rays will converge at point F1. The rays getting reflected off the other mirrors P2 and P3 will still converge at F1 as they are all still a part of the same sphere. However, the intensity of the image formed will be lower compared to the complete spherical mirror.