Question

Which of the following phenomena takes place inside an optical fibre?

Answer 1

Optical fibre is a data transmission technology that uses light pulses that travel along a long fibre, which is usually made of plastic or glass. Metal wires are preferred for optical fibre communication transmission because signals travel with less damage. Electromagnetic interference has no effect on optical fibres.

Complete answer:
The total internal reflection of light is used in the fibre optical cable. The fibres are designed to aid in the propagation of light along with the optical fibre, depending on the power and transmission distance requirements. Long-distance transmission is done with single-mode fibre, while shorter-distance transmission is done with multimode fibre.
The total internal reflection principle governs the operation of the optical fibre. Light rays can transmit a large amount of data, but there is a drawback: light rays travel in straight lines. So, harnessing this advantage will be difficult unless we have a long straight wire with no bends. The optical cables, on the other hand, are designed to bend all light rays inwards (using TIR).
The following components make up a Fibre Optic Relay System:
The Transmitter generates light signals and encodes them for transmission.
The Optical Fibre is the medium used to transmit light pulses (signal).
The Optical Receiver – This device receives and decodes transmitted light pulses (signals) to make them usable.
Long-distance data transmission necessitates the use of an optical regenerator.

Note: Light rays travel indefinitely, bouncing off optical fibre walls and transmitting data from one end to the other. Although light signals degrade over distances, depending on the purity of the material used, the loss is significantly less than with metal cables.