Question

Why do the objects appear to flicker when seen through a turbulent stream of hot air rising above a fire or a radiator? guys answer fast.....

Answer 1

objects appear to flicker when seen through hot air due to atmospheric refraction ( refraction of light by the earth's atmosphere) . the air above the fire or radiator is hoter than the air around it . the hot air is lighter than cool air . the cool air is more denser than hot air . the difference in density causes the light rays to bend. they undergoes multiple refraction. the amount of light entering into the eyes also fluctuate . there fore the object appears to flicker .