On a horizontal plane mirror, a thin equiconvex lens of glass is placed and when the space
Channel: Doubtnut
Date: 2020-07-26

On a horizontal plane mirror, a thin equiconvex lens of glass is placed and when the space between the lens and mirror is filled with a liquid, an object held at a distance D which is 30cm vertically above the lens is found to coincide with its own image as shown in Figure. If equiconvex lens of glass has refractive index `mu=1.5` and radius of curvature `R=20cm`  then find refractive index of the liquid.  img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/BMS_V04_C01_E01_127_Q01.png" width="80%"