Question

What is the essential physical principle of an optical fibre?

Answer 1

Answer:

Total internal reflection

Answer 2

Answer:

The phenomenon involved in the  optical fibers is total internal reflection.

Explanation:

• Total internal reflection may be defined as complete reflection of ray of light within a medium. Such that water glass from the surrounding surface back into the medium.
• The condition responsible for total internal reflection are:-

          The angle of incidence should be greater than critical angle.

             They are should travel from denser medium to rarer medium. In                       order to obtain total internal reflection.

• The phenomenon of total internal refection is seen in
  Mirage formation
  Sparkling of Diamond
  Optical fibers
• Optical fibers are used in communication. It consist of two parts core and cladding . The refractive index of core is greater than cladding . Core is the inner layer and cladding is outer . They ensure any signal loss from the wire.
  
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