Question

Describe the construction and working of an optical fiber. State its uses.

Answer 1

Modern optical fibers are formed by two layers of glass.The inner fiber core (8 μm) is surrounded by a concentric core of lower index glass known as cladding (125 μm). The cladding is surrounded by a protective layer. The total internal reflection occurs as the core-cladding interface.
The principle of Total Internal Reflection is used for the transmission of light along the optical fibers. This is the fundamental principle responsible for making the optic transmission possible