The focal lengths of a lens are in the ratio 8:3 when it is immersed in two different liquids refractive indices 1.6 and 1.2 respectively. The refractive index of the material of the lens i

The focal lengths of a lens are in the ratio 8:3 when it is immersed in two different liquids of refractive induces 1.6 and 1.2 respectively. The refractive index of the material of the lens is

A convex lens is immersed in a liquid, whose refractive index is equal to the refractive index of the material of the lens. Then its focal length will

A double convex lens has a focal length of 25 cm in air. When it is dipped into a liquid of refractive index 4/3. its focal length is increased to 100 cm. Find the refractive index of the lens material.

What happens when a convex lens of refractive index 1.2 is immersed in a liquid of refractive index 1.3?

The focal length of lens of refractive index 1.5 in air is 30cm When it is immersed in water of refractive index (4)/(3) ,then its focal length will be