Matter has a wavefunction associated to it. But what about light? Does it have both a electromagnetic wave described by Maxwell's equation and a wavefunction described by Schroedinger's equation?
Or is the electromagnetic wave considered to be the wavefunction of the photon?
I read somewhere that in interference patterns, the highest intensity peaks of a EM wave correspond to greatest probability of observing a photon. Elsewhere that photons have no wavefunction associated to them because massless particles have no position eigenstate.
Which one is true?
Intensity of EM waves = probability distribution for photon location