Whether the power of a lens will be more in air or in water?

Explain whether power of a lens will be more in air of water?

Define power of a lens

The unit of power of lens is…… .

A convex lens is made of glass of refractive index 1.5. If radius of curvature of the each of its two surfaces is 20 cm, find the ratio of power , of lens when placed in air to its power, when immersed inside a liquid of refractive index 1.25 .

A convex lens is made of glass of refractive index 1.5.If radius of curvature of the each of its twosurfaces is 20 cm,find the ratio of the power of the lens,when placed in air to its power ,when immersed inside a liquid of refractive index 1.25.

Define 1 dioptre of power of a lens

Define 1 dioptre of power of a lens

Find the ratio of the powers of a glass lens in water and in air .Given,refractive index of glass =1.50,refractive index of water=1.33.