Consider a tank made of glass (refractive index 1.5) with a thick bottom. It is filled with a liquid of refractive index `mu`. A student finds that, irrespective of what the incident angle I (see figure) is for a beam of light entering the liquid, the light reflected from the liquid glass interface is never completely polarized. For this to happen, the minimum value of `mu` is :

Consider a tank made of glass (refractive index 1.5) with a thick bottom. It is filled with a liquid of refractive index A student finds that, irrespective of what the incident angle i (see figure) is for a beam of light entering the liquid, the light reflected from the liquid glass interface is never completely polarized. For this to happen, the minimum value of mu is x//sqrt(5) . Find x.

A lens is made of flint glass (refractive index =1.5 ). When the lens is immersed in a liquid of refractive index 1.25 , the focal length:

A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will