Hello ! I have a very old doubt about Electromagnetic Waves, I hope somebody can help me. Is the electric field of an EM wave really an Electric Field? I mean, what is the difference between that E field and an Electric field produced by, for example, an electron? If we have an EM wave, polarized, with a ver very low frequency, then in some point of the space we will see a constant Electric field? like if it was generated by a charged particle or body? Thanks !!! Enrique.