Question

The ratio of focal length of spherical mirror to its radius of curvature is

Answer 1

Answer:

radius of curvatures length =double the length of focal length

so,

1/2

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.