|MadSci Network: Chemistry|
I read a post in which a scientist answered the question why the sky is blue at day and black at night. He also said that if you make a photograph of the sky at night, with a long lighting time (or whatever that's called in English) you see a green colour. He explained that that's because of reactions 80 km above us. So what's going on there? What causes this green light. Or is it yellow plus the blue light scattered around?
Re: What causes the green light in the sky.
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