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

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.     The combination behaves like