Optical fibre works on the principle of

Optical fibre works on the principle of total internal reflection. When light enters the core of the fibre at a specific angle, it strikes the boundary between the core and the cladding. Since the core has a higher refractive index than the cladding, the light is reflected back into the core rather than passing through. This process allows the light signal to travel long distances by bouncing along the inside of the cable with minimal loss of energy. This mechanism is the foundation for high speed data transmission in telecommunications.