Question

Explain total internal reflection with giving example of mirage

Answer 1

• Mirage is caused due to TIR(Total internal reflection).
• On a hot day in desert as the Earth surface is hot hence the air closer to surface would be rarer compared to the upper air.
• So when a light ray travels from upper air to the air closer to surface it travels from denser to rarer medium. So TIR takes place.

• Due to mirage  on a hot day when we are travelling on a highway, the distant patch of road appears to be wet but it not.
• Google Mirage TIR for images.(for better understanding)

Answer 2

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