Question

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

Answer 1

Answer:

Total Internal Reflection is the complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.

Explanation:

Two Requirements for Total Internal Reflection:-

TIR only takes place when both of the following two conditions are met: the light is in the more dense medium and approaching the less dense medium. the angle of incidence is greater than the so-called critical angle.

Answer 2

 Answer:

if light passes through denser medium to rarer medium and if angle of reflection is greater than critical angle then , light doesn't enter rarer medium but bounce back to same same medium

Explanation:

conditions :

• light should travel from denser to rarer medium
• angle of reflection should be greater than critical angle