I was sitting outside enjoying the sun. When i noticed «heat waves», close to the ground. What exactly are heat waves, and why can i see them?
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Great response from u/nmxt
I’ll just add that a related effect combined with light reflecting off the ground can make those rippling blue (because of the sky) heat waves appear to be on the surface of the ground as well. This is the cause of the mirage appearance of water in the distance of a desert or on a flat, hot black asphalt road.
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