I know photon is considered a point particle, so it means it has no physical dimensions, if I'm not wrong. Plus, it has a probability wave function associated to it. It also interacts as a wave which consists of an electrical and magnetic field perpendicular to each other and delayed by a phase.For long wavelength it is easier to imagine them interacting as waves. Personally I don't understand the particle existence. As a particle, clearly, has no size, but what about the wave? If a photon is emitted in discrete packs of energy then is it a way to calculate the length of a pack in radians for a given frequency ? Can we at least say they have the same length, like for instance 2PI radians?