Question

explain the formation of mirages​

Answer 1

Answer:

it is not cleral what you have said

Answer 2

Answer:

• Mirage is an optical illusion caused by atmospheric conditions which is caused by the refraction of light from he sky by heated air .
• the formation of mirage is the best example where refractive index of a medium varies throughout the medium .
• during the hot summer day ,air just above the road surface is very hot and at higher altitudes is cool.
• we know that refractive index of air increases with density . so , the cooler air at the top has greater refractive index than hotter air above the road .
• light travels faster throught the thinner hot air than through , the denser cool air above it .
• when light from a tall object such as tree or from sky passes , through a medium just above the road whose refractive index deceases towards ground suffers refraction and takes a curved path because of total internal reflection.

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