A thin plano-convex lens acts like a concave mirror of radius of curvature `20 cm`
Channel: Doubtnut
Date: 2020-07-05

A thin plano-convex lens acts like a concave mirror of radius of curvature `20 cm` when its plane surface is silvered. The radius of curvature of the curved surface if index of refraction of its matarial is `1.5` will be