Finger with bundle of optical fibres

Finger with bundle of optical fibres

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Credit: NOVASTOCK/SCIENCE PHOTO LIBRARY

Caption: Fibre optics. View of a bundle of optical fibres held up against a human finger to show that they are conducting light. Optical fibres are made from 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: and finger, and optical fibres, communication, communications, fibre optic, fibre optics, finger, light guide, optical fibres, technology

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