Question

A transparent sphere of radius R and refractive index mew is kept in air. Distance of the point object from the surface of the sphere so as to form a real image at the same distance from the sphere is​

Answer 1

Answer:

Therefore, the distance of a point object from the surface of the sphere to form a real image at the same distance from the second surface of the sphere is u=Rμ−1. Hence, the correct option is (C). Note: Refractive index is basically the ratio of speed of light in medium to the speed of light in air.