/u/graaahh's posts in /r/askscience
If everything in the universe was visible to the naked eye (assuming there's nothing in front of it) in the night sky, would the sky be completely lit up? Or would it still appear mostly dark, with only extremely tiny points of light?
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How does purple blend into red if purple is really high wavelength light and red is really low wavelength?
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If you put some amount of a radioactive element into a magic box that neither absorbs radiation nor allows it to penetrate, would the alpha and beta decay cause the element to simply split into a daughter isotope and some amount of helium?
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What would happen to two particles traveling at 50% c that collided head on? Would this be the same as a single particle traveling at c hitting an immobile object?
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How does the Octet Rule (all valence electrons want to be paired) not violate Hund's Rule (unpaired electrons are lower energy than paired ones) when atoms always want to be at the lowest energy possible?
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Watching Human Universe, Brian Cox said, "If you decreased the speed of light by just a few percent, our universe would have no carbon in it. Increase it by that same amount, and our universe would have no oxygen." Why would the speed of light even affect the elemental composition of the universe?
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