Fibre optics with telephone flex

Fibre optics with telephone flex

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Credit: STEVE HORRELL/SCIENCE PHOTO LIBRARY

Caption: Fibre optics. Bundle of optical fibres conducting light. A piece of flex from a telephone can be seen behind them. 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: communication, communications, fibre opti, fibre optic, fibre optics, flex, light guide, optical fibres, speed of light, technology, telephone, telephone flex

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