Fibre optic cable being wound onto a spool

Fibre optic cable being wound onto a spool

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Credit: ED YOUNG/SCIENCE PHOTO LIBRARY

Caption: Fibre optics. Optical fibres being wound onto a spool, monitored by a technician. Optical fibres are made of a flexible glass and have a high refractive index. They are coated with an outer protective layer that has a low refrac- tive index. When light is passed through the fibre in pulses, the beam that emerges from the end of the fibre is completely internally reflected. The light may thus travel along the entire cable with little or no absorption. The pulses of light may carry computer data or telephone conversations, for example. Photograph of optical fibres which will be used in a Trident nuclear missile launching system on a submarine.

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Keywords: communications, fibre optic, fibre optic cable, fibre optic manufacture, fibre optics, glass fibre optics, manufactur, optical fibre, optical fibres, spool, submarine, technology, trident missile

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