20 A thin equiconvex lens has focal length and refractive

Last updated: 6/7/2023

20 A thin equiconvex lens has focal length and refractive index 1 5 One of its faces is now silvered and for an object placed at a distance u in front of it the image coincides with the object The value of u is 1 10 cm 2 5 cm 3 20 cm 4 15 cm Cu il A 1 27 R