What are the uses of optical fibre?

Explanation

Optical fibre: A long thin strand of quartz or glass on which a layer of material having refractive index less than glass or quartz in known as an optical fibre.
Principle: Optical fibre works on the principleof total internal refraction.
Working: Whn the light is incident on the end of the fibre at a small angle, the light passes inside, it suffers multiple total internal reflections inside it and ultimately comes outof the other edge without any loss of intensity. The angle of incident is always greater than the critical angle of the core material w.r.t cladding. Even if the fibre isbent or curved as shown in fig the light can easily travely through along the fibre.