Question

conditions of TIR and applications​

Answer 1

The ray of light should travel through an optically denser medium into an optically rarer medium. The angle of incidence should be equal or greater than the critical angle (iC) for the two mediums.

Answer 2

Answer:

the light must be travelling from a more dense medium into a less dense medium (ie glass to air) the angle of incidence must be greater than the critical angle