The length of the optical path of two media in contact of length `d_(1)` and `d_(2)` of refractive indices `mu_(1)` and `mu_(2)` respectively, is

The length of the optical path of two media in contact of length d_(1) and d_(2) of refreactive indices mu_(1) and mu_(2) respectively, is

If mu_(1) and mu_(2) are aboslute refractive index of medium 1 and medium 2 respectively, then

If mu_(1) and mu_(2) are aboslute refractive index of medium 1 and medium 2 respectively, then

A hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquid L_(1) and L_(2) having refractive indices mu_(1) and mu_(2) respectively (mu_(2)gtmu_(1)gt1) . The lens will diverge a parallel beam of light if it is filled with

Speed of light through two media of refractive indices mu_(1) and mu_(2) are u_(1) and u_(2) respectively, then

If refractive index of core & cladding are mu_(1) & mu_(2) respectively then :

If refractive index of core & cladding are mu_(1)&mu_(2) respectively then :