Conditions for Total Internal Reflection:
For total internal reflection, it is necessary that the light must pass through the dense medium to the rare medium and the angle of incidence should be greater than the value of the critical angle.
Examples of Total Internal Reflection in Daily Life:
1:Shiny Diamond Appearance:
3: Air Bubble in the Paperweight:
4: Mirage in the Desert:
In the desert, in summer days, sometimes waving at some distance, reflecting reflections of the reservoir or trees located far away, this visual illusion is called Marichika. The reason for this phenomenon is the complete internal reflection in the layers of air. Because the sand in the desert is very hot on hot days, the air near it also acts as a rare medium than above, so the light coming from above through some object enters the rare medium. If the angle of incidence is greater than the critical angle, there is a complete internal reflection of the light beam. The reflected beam tilts towards the normal due to the dense medium above, and for the distant observer, the light appears to be coming from the bottom of the ground surface causing the illusion of water at the site.