Question

Fiber optics is based on the physical phenomena called:

A. Absorption B. Dispersion C. Refraction D. Total internal reflection E. Chromatic Aberration

Why?

Answer 1

Ans: D. Total internal reflection.

The light transmitted as a radiation with certain velocity depends on the type of the medium in which the transmission occurs. In fiber optics light transmits in the form of
rays in order that the light be totally reflected, the incident
angle should be greater than the critical angle so that continuous reflections would happen inside the fiber optics. This depends on a physical phenomenon called total internal reflection.

The ray that enters the fiber with an angle less than the acceptance angle is reflected in an angle so that when the incident angle is change the exit angle also be changed. When the incident angle is changed, a displacement will take place this displacement affects the value of the exit angle.