A plano-convex lens `(mu = 1.5)` has a curved surface of radiys 15 cm. what is its focal length ?

The radii of curvature of two spherical surfaces of a concave convex lens (mu=1.5) are 20 cm and 40 cm. (i) What is its focal length when it is in air? Also find its focal length when it is immersed in a liquid of refractive index (ii) mu=1.2 (iii) mu=2

A plano-convex lens has refractive index 1.6 and radius of curvature 60 cm. What is the focal length of the lens?

A plano-convex lens has refractive index 1.6 and radius of curvature 60 cm. What is the focal length of the lens?

If in a plano-convex lens, the radius of curvature of the convex surface is 10cm and the focal length of the lens is 30cm, then what is the refractive index of the material of lens ?

What is the refractive index of material of a plano-convex lens, if the radius of curvature of the convex surface is 10 cm and focal length of the lens is 30 cm ?

What is the refractive index of material of a plano-convex lens , if the radius of curvature of the convex surface is 10 cm and focal length of the lens is 30 cm ?

What is the refractive index of material of a plano-convex lens , if the radius of curvature of the convex surface is 10 cm and focal length of the lens is 30 cm ?