A large convex spherical mirror in an amusement park is

Last updated: 6/8/2023

A large convex spherical mirror in an amusement park is facing a plane mirror 10 m away A body of height 1 m standing midway between the two sees himself twice as tall as in plane mirror as in spherical one In other words the angles subtended at the observer by the image in plane mirror is twice the angle subtended by the image in the spherical mirror The focal length of the convex mirror is