Question

If 1 is the refractive index of core and 2 is the refractive index of cladding, then correct relation for the propagation of light in fibre i

Answer 1

Explanation:

Cladding in optical fibers is one or more layers of materials of lower refractive index, in intimate contact with a core material of higher refractive index. The cladding causes light to be confined to the core of the fiber by total internal reflection at the boundary between the two.

Answer 2

Answer:

Cladding in optical fibers is one or more layers of materials of lower refractive index, in intimate contact with a core material of higher refractive index. The cladding causes light to be confined to the core of the fiber by total internal reflection at the boundary between the two.