What causes EM radiation?? the answer is in the oscillation of charged particles, but why or how does that produce electromagnetic radiation? How does the fluctuations in the electromagnetic fields cause release of virtual phtotns, or does it, and other EM radiation?? please help me through conceptual logic as I am very confused.. Once those base questions are answered, can some1 please tell me how the virtual photon itself works and why it is only a sunstaiable magnitude for a limited time. in essence, why is it "virtual" or what causes it to be.. Also, if possble, may have the definition to a virtual particle because to me it seems very... umm "scalar", with no particle sense of a pin-point orentation.