Question

Explain how the concept of total internal reflection is used in Optical fibers for communication.

Answer 1

Answer:

Total internal reflection occurs when light is incident from denser to rarer medium

So the inner surface of the optical fiber is made of hight refractive material and it's coating is of lesser refractive index material

So that TIR can occur

Now the signal to be sent is incident on the inner surface of optical fiber such that it is greater than critical angle

Due to which TIR occurs at boundary and signal do not escape and gets reflected