Hello, I am having a lot of trouble in determining the difference between an electromagnetic field and electromagnetic radiation. Is an electromagnetic field caused by electromagnetic radiation within the space of which the field acts over? However if I am right a point charge that is not moving has an electric field but emits no radiation, if this is the case then how can it exert a force on another charged particle that is also stationary within a certain distance without the means of electromagnetic radiation for their interaction? Also what actually happens when two fields meet, e.g with two non-stationary positive point charges, what goes on in terms of the fields/radiation that makes them both feel a force of repulsion? (Are there any theories which could explain this other than boson exchange?) Sorry if this isn't very clear, thanks in advance!