I wondered about the photon exchange mechanism when my AP physics teacher taught about it. Essentially, it's like shooting a basketball back and forth. I don't see the attractive part, but's that what the analogy was on the internet thing used. I assume it's in the math, anyway. But my main question is, do these photons have a frequency of 0? In order to be constant repel or attract, would the photon not have to see on the same cycle to keep the charge correct(EM radiation is a cycling electric field, oscillating between positive and negative). To be constantly positive or constant negative, the photon would have to not oscillate, hence 0 Hz. The main contradiction with accepting this is that photons ARE oscillations in the electric field(magnetic arises from the changing electric, I believe), causing EM radiation. So am I envisioning in incorrectly, or can photons sometimes have frequency and sometimes not have frequency, depending on the source? Since I'm also in the quantum mechanics section, which covers antimatter(I think), what is it that attracts neutrally charged particles/antiparticles together, like a neutron/antineutron pair? I think I've read somewhere that neutrons are polarized somehow, so this is the only thing I can think of, aside from the other opposite features attracting(like quarks or the other things) Thank you for your help.