of uniform thickness and refractive index n 1 4 is coated on

Last updated: 6/1/2023

of uniform thickness and refractive index n 1 4 is coated on convex spherical surface of radius R at one end of a long solid glass cylinder of refractive index n 1 5 as shown in figure Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at a distance f from the film while rays of light travelling from glass to air get focused at a distance f from the film then coating air 1 f 3R 3 f 3R n n cylinder 2 f 2R 4 f 1 4R