As for why we use eigenfunctions to represent the observables, I found [1] to have a satisfying explanation that was satisfying to me. [1] https://physics.stac

As for why we use eigenfunctions to represent the observables, I found [1] to have a satisfying explanation that was satisfying to me. [1] https://physics.stackexchange.com/questions/583835/why-do-we-use-eigenvalues-to-represent-observed-values-in-quantum-mechanics https://physics.stackexchange.com/questions/583835/why-do-we...