A small object stuck on the surface of a glass sphere `(n=1.5)` is viewed from the diametrically opposite position. Find transverse magnification.

A small object stuck on the surface of a glass sphere (mu=4//3) is viewed from the diametrically opposite position find transverse magnification.

A mark on the surface of a glass spehre (mu=1.5) is viewed from a diametrically opposite position. It appears to be at a distance 10 cm from its actual position. The radius of the sphere is