69 A plano convex lens u 1 5 has radius of curvature 10 cm

Last updated: 6/28/2023

69 A plano convex lens u 1 5 has radius of curvature 10 cm It is silvered on its plane surface Find focal length after silvering 1 10 cm 2 20 cm 3 15 cm 4 25 cm 2 f 25 3 f f 4 f 25 M