Question

What is Total internal reflection? ​

Answer 1

Answer:

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.

Answer 2

Answer ->

When light ray travels from denser medium to rarer medium then a part of the light ray is partially reflected back into the same medium while partially refracted back into another medium

This is Total internal reflection.

Thanks!! ☺