Question

Optical Fibre which is used in communication works on which principle

Answer 1

A fundamental optical parameter one should have an idea about, while studying fiber optics is Refractive index. By definition, “The ratio of the speed of light in a vacuum to that in matter is the index of refraction n of the material.” It is represented as −

n=c/v
Where,

c = the speed of light in free space = 3 × 108 m/s

v = the speed of light in di-electric or non-conducting material