The concave surface of a thin concavo -convex lens of glass of refractive index`1.5`has a radius
Channel: Doubtnut
Date: 23/08/2020

The concave surface of a thin concavo -convex lens of glass of refractive index`1.5`has a radius of curvature of `20cm`.The concave surface has a radius of curvature of `60cm`.The covnex side is silvered and placed on a horizontal surface as shown in the figure.    A small object is placed on the principal axis of the combination,at a distance of `30cm`in front of the mirror.The magnification of the image is