Why doesn't it look blue at sunrise then
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At sunrise/set, most blue light is scattered away, and red/orange scattered slightly at small angles, creating red/orange glow around sun. When sun is high in sky, red scattering is much less so sun itself looks “normal”, but scattered blue light can be seen in rest of the sky.
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It's not really an explanation to just show an equation with no explanation of why that's the equation.
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The oscillating electric field of photons act on the charges within atoms causing them to oscillate at the same frequency. The atom therefore become a small radiating dipole which radiate photons in random directions. The amount of interaction is proportional to the frequency.

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Why is this swapped on Mars?
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The scattering is dependent on the atmosphere I think, so the formula would be different on Mars
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Esto es lo que me explicaste la otra vez!
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jajajaja yep!
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It's also why they sky is blue during the day. http://www.theoretikos.com/2011/04/29/why-is-the-sky-blue/ …
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