The concave surface of a thin concavo-convex lens of index`1.5`has radius of curvature `50cm` and
Channel: Doubtnut
Date: 16/08/2020

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 lens(without silvered)is: