Total internal reflection

The video tutorial explains the concept of total internal reflection, which occurs when the angle of incidence exceeds the critical angle, causing light to be completely reflected within a material. For glass, this critical angle is approximately 42°. This principle is utilized in fibre optic cables to transmit information efficiently over long distances without loss.

How do fibre optic cables utilize total internal reflection?

What advantage does total internal reflection provide for information transmission in fibre optic cables?