- #71

PeterDonis

Mentor

- 40,574

- 18,257

If it has momentum p will it not also have a corresponding wavelength??

First, it's not clear what state you are describing when you say "has momentum p", since momentum is a 3-vector and a state can have a definite energy (which Fock states do) without having a definite momentum 3-vector. Furthermore, eigenstates of 3-momentum in ordinary non-relativistic QM are already non-normalizable, and ordinary non-relativistic QM can't be used for photons, or more generally for the quantum EM field, anyway.

In short, there are a lot of complexities lurking underneath the simple-sounding ordinary language that you and other posters are using in this thread, and those complexities mean that a lot of simple-sounding questions don't have well-defined answers, and aren't really even well-defined questions. What is needed to make the questions well-defined is an explicit specification of the math: what states and what observables are we talking about?