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The color blue is the result of a particular wavelength of light (it is in the shorter wavelength part of the visible spectrum). Different wavelengths bounce off air molecules, or pass around air molecules without bouncing off, depending upon their wavelength, whether it is larger or smaller than the size of an air molecule. As a result the atmosphere alters the light that passes through it. Blue is scattered, making the sky appear blue, while leaving more of the longer wavelengths in the sunlight that reaches the Earth, giving it a warm golden color. This phenomenon is officially known as Rayleigh Scattering.

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Q: Why does the sky appear blue in the day time?
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Related questions

Why does the colour of sky appear blue?

the sunlight interacts with the earths atmosphere and makes the sky blue


Why is the sky blue on earth during day time and black in there moon?

the water in our planet reflects the sun light back to the atmosphere thus we have a blue sky the moon has no water and no atmosphere there for no blue sky during the day in the moon.


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