An optical fibre is made up of fine strands of glass, along which pulses of light can travel. Light travels at a faster speed than electricity and it is, therefore, used in optical cables to carry communications for long distances without electrical interference.
This light travels along tiny glass fibres usually packed into huge bundles capable of carrying thousands of messages at a time. When we talk on the telephone, our voice is turned into laser light signals and sent through thin fibre glass tubes called optical fibres. Only one of these optical fibres can carry up to 150,000 different conversations.
Optical fibres are also used for ornate lighting.
Below Optical Fibres info from Wikipedia (Read More):-
An optical fiber (or fibre) is a glass or plastic fiber that carries light along its length. Fiber optics is the overlap of applied science and engineering concerned with the design and application of optical fibers. Optical fibers are widely used in fiber-optic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communications. Fibers are used instead of metal wires because signals travel along them with less loss, and they are also immune to electromagnetic interference. Fibers are also used for illumination, and are wrapped in bundles so they can be used to carry images, thus allowing viewing in tight spaces. Specially designed fibers are used for a variety of other applications, including sensors and fiber lasers.
http://en.wikipedia.org/wiki/Optical_fiber
