Q. A transparent thin film of uniform thickness and refractive index is coated on the convex spherical surface of radius at one end of a long solid glass cylinder of refractive index , as shown in the figure. Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at distance from the film, while rays of light traversing from glass to air get focused at distance from the film. Then Physics Question Image

 3254  208 JEE AdvancedJEE Advanced 2014Ray Optics and Optical Instruments Report Error

Solution:

For air to glass


For glass to air.