A thin equiconvex lens made of material of refractive index

Last updated: 6/8/2023

A thin equiconvex lens made of material of refractive index 1 5 has a focal length of 10 cm in air One side of the lens is replaced by a medium B of refractive index 1 3 When a point object is placed in air at a distance of 20 cm from the lens on its principal axis its image is formed at a distance of x cm in the medium B from the lens When the same object is placed in medium B at a distance of 20 cm from the lens on its principal axis its image is formed at a distance of y cm in the air from the lens then O x y Ox 1 3 y Ox 1 3 y O x 1 3 y