Optical fibres emitting light. These fibres are used for transmitting data in the form of light. They are usually made from flexible glass that has a

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Optical fibres emitting light. These fibres are used for transmitting data in the form of light. They are usually made from flexible glass that has a high refractive index. Each fibre consists of a core with an outer protective layer (cladding) that has a lower refractive index than the core. Light travelling through the fibre is contained within the core because of total internal reflection at the core/cladding boundary. This allows data to be transmitted over long distances with little information loss.

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Photo credit: © KEVIN CURTIS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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