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

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

Q. Assertion :The focal length of an equiconvex lens placed in air is equal to radius of curvature of either face. Reason: For an equiconvex lens radius of curvature of both the faces is same.

Q. Consider an equiconvex lens of radius of curvature $R$ and focal length $f$. If $f>R$, the refractive index $\mu$ of the material of the lens.

Q. 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

Q.

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