WHY DO DISTANT LIGHTS FLICKER?
In a vacuum, tight travels from a source to our eyes in steaight lines.
But when light passes through the atmosphere, its path is affected by
changes in the optical properties of the intervening air. in particular,
Warm air undergoes changes in density and refrective index that creat
the impression that the location of the source is constantly changing-
Warm air undergoes changes in density and refrective index that creat
the impression that the location of the source is constantly changing-
an effect that we preceive as 'Flickering'.
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