In optical fibre refractive index of core is

In optical fibre is refractive index of core greater than cladding or smaller ?

In optical fibres, the refractive index of the core is

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

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

In optical fibre, refractive index of inner part is 1.68 and refractive index of outer part is 1.44. The numerical aperture of the fibre is

In optical fibre, refractive index of inner part is 1.68 and refractive index of outer part is 1.44. The numerical aperture of the fibre is

In opticle fibres,the refractive index of the core is

In opticle fibres,the refractive index of the core is