Chapter 12.4, Problem 26R

To determine

To explain: The necessary situations for a total internal reflection.

Explanation of Solution

Introduction:

When a light passes from denser medium into the less dense medium, it reflects away from the normal. This condition is termed as a total internal reflection.

The necessary conditions for a total internal reflection are mentioned below:

• In an optically denser medium, the angle of incidence is considered to be greater than critical angle.
• Light ray is supposed to travel from an optically denser medium to an optically less dense medium.

Conclusion: The light wave follows the law of reflection.