How optical fiber works?

Here a video explaining how optical fiber works



Some words you need to know:

• hair-thick wire: "cable con un espesor del tamaño de un pelo".
• core: nucleo, parte central.
• cladding: cubierta protectora.

 A optical fiber is a hair-thick wire made up of glass with a core surrounding by a cladding and the light can go through it at very high speed and without loss.

A simple fiber can transmitt a lot of signals of light:

Nowadays another use of optical fibers is in illumination in a fancy way: