How do optical fibre transmit light without significant absorption?
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The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.
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Optical fibres are designed such that they bend all the light rays’ ( nearly 100% reflection) inwards using principle of TIR. Hence Light rays travel continuously, bouncing off the optical fiber walls without absorption.
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