Optics

Fiber Optics is a technology that uses glass or plastic threads to transmit data. Each of the thread is capable of transmitting messages modulated onto light waves. The light in the fiber optics travels by a process of internal reflection. The core medium of the cable is more reflective than the material surrounding the core. That causes the light to keep being reflected back into the core where it can continue to travel down the fiber. Fiber optic cables are used for transmitting voice, images and other data at close to the speed of light.