- #1

referframe

Gold Member

- 298

- 13

But, I do not understand why the 3 Pauli Matrices that arise from the Dirac equation derivation MUST be physical spin. How do we know that it is not just a mathematical coincidence that the 3 Pauli Matrices embedded in the Dirac equation also happen to be the 3 spin observables/operators?

Comments?

Thanks, in advance.