Question

Explain the formation of mirage?​

Answer 1

$\Large\underline{\underline{\red{\sf \purple{\maltese}\:\: Mirage :- }}}$

Mirage on desert is caused due to " Total internal reflection " of light from boundary of medium. on hot day in the desert the earth surface is hot hence hair closer to the Earth's surface is rarer than the air up . When the light moves through the cold air and into the layer of hot air it is refracted . Let us understand this with the example of a tree in the desert .

When a ray from the top of the tree to the earth , it is travelling from denser to the rarer medium , hence it may suffer Total Internal Refraction at any layer. Hence we can see the image of the tree without water being there.

$\large\qquad\boxed{\pink{\mathfrak {And \ we \ are \ done \ ! }}}$

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$\Large\underline{\underline{\red{\sf \purple{\maltese}\:\: Some \ Related \ Information :- }}}$

$\underline{\underline{\blue{\textsf{\textbf{ \leadsto \: The Brilliance of Diamond :- }}}}}$

• The critical angle of diamond is 24.4° . Being the tendency to become "trapped "inside of a diamond once it enters into the diamond. Most rays approach the diamond at angle of incidence greater than the critical angle $\sf( \theta_c)$ This gives diamond a tendency to sparkle.

$\underline{\underline{\blue{\textsf{\textbf{ \leadsto \: Shining of Air Bubble :- }}}}}$

• Anirban in the water science due to total internal reflection at its outer surface. Here , light is propagated from the denser medium ( water ) to the rarer medium ( air ) and if $\sf i > 49^{\circ}(\theta_c)$ , Total internal reflection will take place .( Refer to second attachment )