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I bet that diamond will glow. you may not have heard of quenching before, but Soviet opticians love to tell the story of Vavilov. he studied luminescence, and before photomultipliers were invented, he used sit in the dark room for hours. the eye would get used to darkness, and become very sensitive. the observer would be able to "detect" a single photon. ok, ...

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There are physical and physiological aspects of this problem. Consider this: if your fingers are freezing in cold is it better to drink a hot tea or cold vodka? Definitely VODKA! Why? because it will immediately cause your blood vessels to widen, more blood will go to your fingers and you'll have a better chance to save them. Did I make this up? No. My ...

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This article has some relevant results based on a study of bird plumage (it also happens to be cited in the abstract of the Nature paper mentioned in one of the other answers), and is summarized in simpler terms here. I'll attempt to summarize the summary. Black and fluffy/loose fitting clothing is best if it is hot out and there is any ($>3 ... 2 The thermal radiation from B does indeed heat object A. The trouble is that A loses energy by thermal radiation faster than the thermal radiation from B can heat it, so the end result is that A cools down. You can show this very easily. The Stefan-Boltzmann law tells us that the energy flux per unit area is proportional to$T^4\$ so the rate of heat loss ...

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Matter in all its forms has a temperature, which can be measured in various scales. This temperature expressed in degrees Kelving is directly related to the average kinetic energy of the atoms and molecules and lattices that compose matter. . E is the mean kinetic energy in joules (J) . kB = 1.3806504(24)×10−23 J/K is the Boltzmann constant ...

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