Question

calculate the fractional refractive index change for an optical fibre if the core and cladding refractive indices are 1.563 and 1.498​

Answer 1

Answer:

Core Index :-

1563

Cladding Index :-

1498

Index of Input Medium :-

1

Numerical Aperture :-

0.446

Acceptance Angel :-

26.5"

Answer 2

Answer:

The fractional refractive index change for an optical fibre is 0.065.

Explanation:

What is the fractional refractive index?

The difference between the core refractive index and the cladding refractive index is the fractional refractive index.

Given:
The core refractive index of optical fibre = 1.563

The cladding refractive index of optical fibre = 1.498

To find:

The fractional refractive index change = ?

Formula: Fractional refractive index change =  core refractive index-cladding refractive index

Solution: Fractional refractive index = 1.563-1.498 = 0.065