3. What is total internal reflection and name one scenario where total internal reflection is involved.

3. What is total internal reflection and name one scenario where total internal reflection is involved.

什么是全反射?并且给出全反射的一个应用.
ANSWER:
Total internal reflection is a phenomenon in which electromagnetic radiation in a given medium which is incident on the boundary with a less-dense medium (one having a lower index of refraction) at an angle less than the critical angle is completely reflected from the boundary.
后半个问题我觉得举光纤就可以了
Optical fibre is a flexible optically transparent fiber,usually made of glass or plastic,through which light can be transmitted by successive TIR.