This e-Note takes learner through a very interesting topic of "Light: Total Internal Reflection" Topics covered in e-Notes are: - Total Internal Reflection - critical angle - Conditions for total internal reflection - Relation between Critical Angle and Refractive Index - Factors affecting Critical Angle - Simple effects of Total Internal Reflection * Why do cut diamonds sparkle? * How are mirages formed? * What is looming of ship? * Why upper surface of water contained in a transparent container appears silvery when viewed from below? * Why an empty test tube held obliquely in water and viewed from top appears silvery? * Why the view of a fish or diver under water is squeezed into a cone?