Question

what is total internal reflection

Answer 1

when the ray of light travels in a rarer medium such that there is no refraction and the light comes back into the denser medium.this phenomena is known as total internal reflection.

Answer 2

Total internal reflection is an optical phenomenon that happens when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.

Two important conditions for total internal reflection are:

》Angle of incidence (i) should be greater than critical angle (ic).

》Ray should travel from denser medium to rarer medium.