Bundle of optical fibres in a metal cable

Bundle of optical fibres in a metal cable

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Credit: ALFRED PASIEKA/SCIENCE PHOTO LIBRARY

Caption: Fibre optics. Bundle of optical fibres emerging from a metal cable. Optical fibres are used to conduct light. These fibres are made of flexible glass that has a high refractive index. Each fibre is then coated with an outer protective layer that has a low refractive index. The light beams that emerge from the end of each fibre have been completely internally reflected. The light may thus travel along the entire cable with little or no absorption. Bundles of optical fibres may be used to carry images, or high volumes of data such as telephone conversations.

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Keywords: cable, communication, communications, fibre optic, fibre optical, fibre optics, in cable, light guide, optical fibres, technology

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