I was reading today about de Broglie and I don't think I really get what is meant by particles having a wave frequency. What is being measured as a wave, the oscillation of the electrons? Also, the book said something about the electrons sending out waves that move faster and even catch up with it after a complete orbit. Does this mean that EM energy is being constantly sent out by electrons and the photons orbit around the nucleus as well, feeding back into the electrons? btw, sorry I don't remember the title or author of the book I was reading to post it.