What would be the color of the sky if the Earth had no atmosphere?
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The light coming from the sun is scattered by the –particles of the atmosphere. The blue light is scattered the most among all the colors in the spectrum of light. The amount of starring is proportional to the . The wavelength of the blue is shorter than the other colors than it is scattered the most .
That is why the sky is seen blue.
If there was no atmosphere there wouldn’t be any scattering of light. The white light coming from the sun would not be scattered. The sky would seen as white.