Question

If the radius of curvature of a spherical mirror is 50cm , what is it's focal length?​

Answer 1

Answer:

Focal length of a concave mirror is 50 cm What is its radius of curvature

Solution : Here, f=50cm,R=? From R=2f=2×50=100cm.

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Explanation:

Answer 2

Focal length of a plane mirror is infinity. (A plane mirror can be considered as a spherical mirror of infinite radius of curvature. Focal length is half of radius of curvature and hence it is infinity.