Question

The focal length of a spherical mirror is _____ the radius of curvature of the mirror.1) twice2) half3) the same as4) unrelated to

Answer 1

The focal length of a spherical mirror is related to the radius of curvature through the equation,

`f=(R)/(2)`

Thus the focal length of a spherical mirror is half the radius of the curvature of the mirror.

Thus the correct answer is option 2.