The sky is blue because the atmosphere scatters blue more than red. When a sunset happens, the blue has been scattered out of view, making the sky a red-orange.
Duh! Because the atmosphere absorbs all of the other colors of the spectrum of sunlight and scatters the blue color. An item that is RED does the same thing.....absorbs all of the other colors of the spectrum, but scatters/reflects the red...
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