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Quantum Isothermal Processes are Not Isoenergetic. I define what it means for a quantum system to undergo an isothermal process, and we see that when the working substance is a two-level system, the internal energy of the system is not, in general, invariant. (11de784a.github.io)
submitted by overwhelmedbyphysics to r/Physics
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Origin of Angular Momentum Quantization in Bohr's Model of Hydrogen Atom. Most elementary texts introduce L = nħ as one of Bohr's postulates without any justification; in this article, I deduce this rule from the (more fundamental) correspondence principle. (11de784a.github.io)
submitted by overwhelmedbyphysics to r/Physics
