Why do we observe random wavering or flicking of the objects near a fire or on a very hot day?
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We observe random wavering or flickering of the objects near a fire on a very hot day due to atmospheric refraction. Refractive index of the hot air is slightly less than that of the cold air.
Since, the density does not remain the same, the Apparent position of the object as seen through hot air, fluctuates.
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