Demonstrating the Critical Angle and Total Internal Reflection Using a Laser Beam


Critical Angle
Laser Beam
Optical Model
Total Internal Reflection


This article demonstrates my experience as a Physics teacher and the challenges I faced when guiding learners to experiment to understand what a critical angle is, and the conditions necessary for total internal reflection to occur. In the article, I have also shared how I overcame these challenges by designing an Optical Model. Further, I have also shared the benefits of the model against the existing and recommended apparatuses as listed curriculum materials that include the syllabus and textbooks. Given its advantages in aiding learning, I strongly recommend its use in teaching the content on a critical angle and total internal reflection in physics.