Optical fibers used in modern telecommunication networks work on which optical phenomenon?

Which one of the following phenomenon is used in optical fibres?

In optical fiber telecommunications, signals are transmitted through the core in the form of:

The formation of glittering colours in thin foam of soap is the result of which of the following phenomenon –

The Sun appears reddish during sunrise and sunset. The phenomenon in optics which is responsible for this appearance of the Sun is

Consider the following physical phenomena: 1. Total Internal Reflection 2. Dispersion of light 3. Refraction of light Which of the above phenomena are responsible for the formation of a rainbow in th…