Question
A biconvex lens made of a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. Will the lens behave as a converging or a diverging lens? Give reason.
Solution
The lens will behave as a diverging lens when light rays enter from air to lens. The refractive of lens is lesser than the refractive index of the medium i.e., water. So. The lens will behave as a converging lens when light rays travel from lens to water.
