Which is Incorrect About Lens?
Which one of the following statements is not correct?
- The radius of curvature of a concave mirror is twice its focal length
- Power of a convex lens is negative and that of a concave lens is positive
- The radius of curvature of a plane mirror is infinity
- When a ray of light passes from an optically denser medium to an optically rarer medium, the angle of refraction is greater than the corresponding angle of incidence