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Why is the sky blue? Anonymous
Was it just me, or did others think that the human race did not know why the sky was blue when they were young?
>> Anonymous
>>256513
It takes anti-depressants
>> Anonymous
>>256522
why do people on /an/ always make lame work safe jokes.

LOL NAME IT BISCUIT NAME IT BISCUIT LOL
>> Anonymous
>>256513
The atmosphere works as a lens. When the sun is near the horizon, sunlight has to go through more air than it does at the zenith. Also pollution.
>> Anonymous
>>256446
The normal gasses in the Earth's atmosphere are nitrogen and oxygen, which scatter blue light. Hence the sky is blue when the sun is directly overhead, as the oxygen and nitrogen are scattering the blue light, making the sky blue.

When the sun is at the horizon, at dawn or dusk, the sky appears red because the dust and other particles in the lower atmosphere scatter red light more effectively than the nitrogen and oxygen scatter blue light, making the sky red at the horizon, and progressively darker/bluer as you look up.
>> Anonymous
>>256599

This man is correct. Science, my fellow anons, look in to it.