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Wordcount: 339

Optical Fibres

You hear about fiber-optic cables whenever people talk about the telephone System , the cable TV System or the Internet. Fiber-optic lines are strands of optically pure glass as thin as a human hair that carry digital information over long distances. They are also used in medical imaging and mechanical engineering inspection. What are optical Fibres? Optical Fibres are long, thin strands of very pure glass about the diameter of a human hair. They are arranged in bundles called optical cables and used to transmit light signals over long distances. How Does an Optical Fibre Transmit Light? Suppose you want to shine a flashlight beam down a long, straight hallway. Just point the beam straight down the hallway -- light trave

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