What is total internal reflection?
In this post, we conduct investigations to examine qualitatively and quantitatively the refraction and total internal reflection of light, as a part of the Prelim Physics course under the module Waves and Thermodynamics and sub-part Ray Model of Light. Total internal reflection is the phenomenon that involves the reflection of all the incident light off the boundary, that occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.
The following two videos cover the topic of total internal reflection, and further into geometric optics.
Part 1: Crash Course geometric optics