Optische Fasern, Licht emittieren. Diese Fibresare zur Übertragung von Ton und Bild in Theform des Lichts verwendet.

andlt;strongandgt;Optical fibresandlt;/strongandgt; emitting light. These fibresare used for transmitting sound and images in theform of light. They are usually made from flexibleglass that has a high refractive index. Each fibreconsists of a core with an outer protective layer(cladding) that has a lower refractive index thanthe core. Light travelling through the fibre iscontained within the core because of totalinternal reflection at the core/cladding boundary.This allows data to be transmitted over longdistances with little or no absorption.