Question

Hello friends . What is critical angle and what is TIR?
​

Answer 1

Answer:

1. the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.
2. meaning of TIR is Transports Internationaux Routiers

Answer 2

Answer:

Total internal reflection takes place when the angle of incidence for the light ray is greater than the so-called critical angle.

TIR stands for "Transports Internationaux Routiers" or "International Road Transports".) The 1975 convention replaced the TIR Convention of 1959, which itself replaced the 1949 TIR Agreement between a number of European countries