How can zero-point vacuum energy be Lorentz Invariant? I offered my best explanation. Any input? https://physics.stackexchange.com/questions/447371/how-can-zero-point-energy-vacuum-be-lorentz-invariant …
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Right, this comes down to $\hbar \omega $ not having the right units for a photon distribution (1/E).. I just assumed that since in his question he says that ρ(ω)dω \propto \hbar ω that there were some dimension full constants what we re ignored.
at least the original question did.. I don't know why he made that edit..