The focal length of a plano-convex lens is equal to its radius of curvature. The value of the refractive index of its material is

The focal length of a double convex lens is equal to radius of curvature of either surface. The refractive index of its material is

The focal length of an equiconvex lens in air i equal to either of its radii of curvature. The refractive index of the material of the lens is …........

The focal length of an eqniconvex lens is equal to the radius of curvature of either face. What is the value of refractive index of the material same of the lens?

Focal length of the plano-convex lens is when its radius of curvature of the surface is R and n is the refractive index of the lens.

The focal length of an equi-convex lens is greater than the radius of curvature of any of the surfaces. Then, the refractive index of the material of the lens is

The radius of curvature of eithr face of a conex lens is equal to ts focal length .What is the refractive index of its material?

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