Of course.
Thanks for the kick.
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A few hours later:
You mentioned Compton. The wave length of the scattered photon would be constant given the constant rest mass of the particle.
So if we look at the electron, a known constant rest mass, then Schroeder's equation ends up with 3 constants (m, c, h) and the one variable (f) to be calculated. f would also be constant for any specific mass.
So all electrons will have only the one frequency. But we know this is not right. It is still absurd.
Edited by AZPaul3, : much thinking.
Edited by AZPaul3, : No reason given.