The concave surface of a thin concavo-convex lens of index`1.5`has radius of curvature `50cm` and`10
Channel: Doubtnut
Date: 2020-08-23

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: