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Forums
Physics
Quantum Physics
Do atoms recoil when emitting a photon?
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[QUOTE="PeterDonis, post: 6847478, member: 197831"] Yes. The fact that atoms at finite temperature have nonzero kinetic energy. There is no original answer to where that energy comes from; it's always been there, ever since the Big Bang. In fact the expansion of the universe has [I]cooled[/I] things off tremendously. I have said no such thing. Any object at finite temperature will emit radiation. Even if the individual atoms are all in their ground states, that just means the energy due to the finite temperature is in other degrees of freedom, such as the linear motions of atoms or the vibrations of molecules. [/QUOTE]
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Forums
Physics
Quantum Physics
Do atoms recoil when emitting a photon?
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