Submitted by colorado_hick t3_100y631 in askscience
Alis451 t1_j2m1v1a wrote
Reply to comment by tylerchu in Does cold temperature make vistas more 'crisp' looking? by colorado_hick
> any fluctuation in their output
the heat shimmer is what causes that fluctuation. there are other causes like gas pockets and dust, but the heat differences is the most common.
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