Why the sky is blue?

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Each element has certain colors it reflects, our atmosphere composition (mainly nitrogen) = blue


In the morning and evenings the sky isn't blue, but during the day it is. This is a phenomenon caused by the behavior of light and how it's properties like color change as it travels through space. When the sun is directly overhead light emitted from it passes the shortest distance it can to reach you. The shortening of the distance causes the light to appear blue to the human eye. In the early morning and evenings the sun is over the horizon and the light it creates travels further to reach you. This change in distance causes a color change that is more red/orange to the eye. If you'd like to learn more about light I'd suggest checking out some entries on the electromagnetic spectrum.

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