A convex mirror is made by cutting a hollow sphare of radius of curvature 20 cm. Find the focal length of the mirror.

A concave mirror is made by cutting a portion of hollow glass sphere of radius 24 cm. Find the focal length of the mirror

The radius of curvature of a convex mirror is 40 cm. Find its focal length.

The radius of curvature of a plane mirror of focal length 40 cm is :

Find the radius of curvature of a convex mirror whose focal length is 0.6 m.

Radius of curvature of a concave mirror is 24 cm. Then find the focal length of the mirror ?

The focal-length of a spherical mirror of radius of curvature 20cm is

The radius of curvature of a spherical mirror is 25 cm Find its focal length.