Question

Which of the following statements is true?

(a) A convex mirror has 5 dioptre power having a focal length 0.20 m

(b) A convex mirror has -5 dioptre power having a focal length 0.20 m

(c) A concave mirror has 5 dioptre power having a focal length 0.20 m

(d) A concave mirror has -5 dioptre power having a focal length 0.20 m​

Answer 1

Answer.

option b

Explanation:

The focal length of a convex mirror is positive and the power of the convex mirror is negative

The focal length of a concave mirror is negative and the power of the concave mirror is positive.