Question

A spherical mirror converges a beam of light, at a given point on the principal axis. Which of the following statement(s) about the mirror is are true?

1. (a) The mirror used in concave
2. (b) The mirror has positive focal length
3. (c) The point of convergence is the principal focus of the mirror

• A. 3 only
• B. 1, 3
• C. 2, 3
• D. 1, 2

Answer 1

Answer:

B. 1, 3

• A converging mirror is a concave mirror.

• Concave mirrors have a positive focal length.

• The point of convergence of parallel rays is the principal focus.

• Therefore, statements (a) and (c) are true.