Why is the sky blue?
Why the sky is blue, not violet?
Because the color Violet is considered to have a long wavelength that means the color with the long-wavelength is less visible.
Why the sunsets are red?
At, sunset light must travel farther through the atmosphere before it gets to you, the more the light is scattered and reflected the dimmer the sun looks. And the color of the sun also changes, first to orange then to red because shorter wavelength color like blue is scattered and only long-wavelength colors like orange and red are only left to see.
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