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 reasons.

Answer 1

Hint:Various types of lenses are accessible. In terms of their form and materials, lenses vary from each other. A converging lens is a lens that converges light rays that pass along its main axis. Converging lenses may be identified in their form; their centre and bottom edges are relatively thick. A lens that diverges is a lens that diverges light rays that pass parallel to its main axis. Diverging lenses can also be identified by their shape; on their middle and lower rims, they are comparatively thin.

Complete step by Step Solution:
A biconvex lens functions as a diverging lens since the lens material's refractive index is lower than the air refractive index. The lens material's refractive index ( $1.25$ ) is much less than the water refractive index ( $1.33$ ). It's going to serve like a converging lens.

Note:If the refracted rays converge after refraction to a single point, the lens is considered a converging behaviour. This is seen in the creation of a real picture. This can be used in applications where all light intensity is focused at one location. Often known as a converging lens is a convex lens. It should also be remembered that, when the object is very close to the mirror, convex still exhibits diverging behavior.
If refracted rays tend to vary from one point, the action of the lens is referred to as different. When a virtual image is produced, that is observed. This may be used for applications where light intensity is to be scattered around the appropriate area. Concave lens is often a divergent objective.