A plano convex lens when silvered at its plane surface is

Last updated: 6/9/2023

A plano convex lens when silvered at its plane surface is equivalent to a concave mirror of focal leng 28 cm When its curved surface is silvered and the plane surface not silvered it is equivalent to concave mirror of focal length 10 cm then the refractive index of the material of the lens is A 9 14 B 14 9 C 17 9 D none of these the radius of curvature of the curved surface of plano convex lens is