Question

What is total internal reflection and what are the necessary conditions for it to take place?

Answer 1

definition and condition for total internal reflection to take place

Explanation:

DEFINITION

The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle

CONDITIONS FOR THE TOTAL INTERNAL REFLECTION TO TAKE PLACE

1) The index of refraction must decrease across the boundary in the direction of light refraction

2) The angle of incidence of the light ray must exceed the critical angle of the interface