Optical fibres are widely used in fibre optic communications which permits transmission over longer ...........

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Optical fibres are widely used in fibre optic communications which permits transmission over longer distances and at higher bandwidth (data rates) because

1. It can carry signals for a much long distance without repeaters

2. Light travels in optical fiber based on principle of total internal reflection

3. It is not affected by electro-magnetic interference

Which of the above reason is/are correct?

1 only

1 and 3

2 and 3

1, 2 and 3

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Explanation:

Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. Fiber is preferred over electrical cabling when high bandwidth, long distance, or immunity to electromagnetic interference are required. It is based on the principle of TIR.