SILVERING OF LENS

Lens Silvering||Cutting OF Lens

The convex surface of a plano-convex lens is silvered and the radius of curvature of this surface is R. Find the focal length of the system:

A planocovex lens is made of a material of refractive in mu=1.5 The radius of curvature of curved surface of the lens is 20.cm. If its plane surface3 is silvered, the focal length of the silvered lens will be

The concave surface of a thin concavo-convex lens of index 1.5 has radius of curvature 50cm and 10cm respectively.The concave side is silvered andplaced on a horizontal surface as shown Focal length of silvered lens is: