This is The Principle of Total Internal Reflection. Fiber optic cables themselves must be connected to some kind of network in order to transfer information in these amazing ways. To find out, take a look at Optical Networks. Electrical signals travel faster at higher frequencies in optical cables, and they can carry more than one set of these signals. Glass fiber optic cables are less expensive than copper for telephone companies to buy and install.
Laser light carries sound or other data through the optical fibers in fiber optic cables.
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