A thin equi-convex lens is made of glass of refractive index `1.5` and its length is
Channel: Doubtnut
Date: 05/07/2020

A thin equi-convex lens is made of glass of refractive index `1.5` and its length is `0.2 m.` If it acts as a concave lens of `0.5 m` focal length when dipped in a liquid, the refractive index of the liquid is