Optical fibres can transmit signals over long distances mainly because light inside them undergoes:
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Correct Answer: Option C
Explanation:
Inside an optical fibre, light continuously reflects from the inner surface without escaping. This repeated total internal reflection keeps the light trapped inside the fibre, allowing information to travel very far with little loss of energy.
Inside an optical fibre, light continuously reflects from the inner surface without escaping. This repeated total internal reflection keeps the light trapped inside the fibre, allowing information to travel very far with little loss of energy.