alleryA mirage is caused by which property of air?
ARefraction with temperature
BHigh pressure over deserts
CCondensation of vapour
DScattering by dust only
Answer & Solution
Correct answer: A. Refraction with temperature
1. The refractive index of air depends on temperature.
2. A large temperature gradient bends light rays, giving a mirage.
3. Pressure and condensation do not bend light this way.
_Source: Wikipedia, Atmosphere of Earth, Refractive index_
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