In an optical fibre ,the refractive index of the core material is

In optical fibres, the refractive index of the core is

In opticle fibres,the refractive index of the core is

In opticle fibres,the refractive index of the core is

In an optical fibre ,the refractive indices of the core and the cladding are given by n_(1) and n_(2) respectively . Light can travel through the optical fibre if

In optical fibre refractive index of core is

In optical fibre refractive index of core is

In optical fiber the refractive index of the material of the core is………. That of the cladding.

Refractive index of a transparent material is :