Often misspelled as Optical Fiber
1. A thin, transparent and flexible fibre
, made of glass or plastic; used for transmitting light.
1. Optical fibres
are widely used in fibre-optic communications, which permits transmission over longer distances, and at higher bandwidths (data rates) than other forms of communication.
2. Optical fibres
are also better than your standard conventional metal wires, because signals travel along them with less loss, and are also immune to electromagnetic interference.