A convex lens of focal length `20 cm` and made of glass `(mu = 1.5)` is immersed in water
Channel: Doubtnut
Date: 02/08/2020

Please add A convex lens of focal length `20 cm` and made of glass `(mu = 1.5)` is immersed in water of `mu = 1.33` Calculate change in focal length of the lens.