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Energy is the conserved quantity associated to time-translation invariance and represents the work a system is capable of doing. Use this tag for questions about energy, and consider adding the [energy-conservation] tag if it is specifically about its conservation.
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What does the term $e^{-h\nu /kT}$ in Boltzmann distribution function mean and what roles do...
The physical idea that comes to my mind is that the Boltzmann factor $ e^{\frac{-h\nu}{kT}} $ expresses the probability of finding a state with energy $E = h\nu$ relative to the probability of finding … a state with energy zero. …