A planocovex lens is made of a material of refractive in μ=1.5 The radius of curvature of curved surface of the lens is 20.cm. If its plane surface is silvered, the focal length of the silvered lens will be A planocovex lens is made of a material of refractive in μ=1.5 The radius of curvature of curved surface of the lens is 20.cm. If its plane surface is silvered the focal length of the silvered lens will be August 13, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related