The refractive index of a material of a plano concave lens is `5/3`. Its radius of curvature is 0.3 m. Focal length of the lens in air is

The refractive index of a material of a plano-concave lens is 5/3 , the radius of curvature is 0.3 m. The focal length of the lens in air is

The refractive index of a material of a plano-concave lens is 5/3 , the radius of curvature is 0.3 m. The focal length of the lens in air is

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 ?

Find the refractive index of the material of a plano-convex lens, if the radius of curvature of the convex surface is 20 cm and focal length of the lens is 60 cm?

Find the refractive index of the material of a plano-convex lens, if the radius of curvature of the convex surface is 20 cm and focal length of the lens is 60 cm?