It's been a while. But I have always received the help I needed on this forum. I had this question in my head, When a particle accelerates, it creates an oscillating electric field, and a photon. How much does this effect, affect the energy of the particle itself? Say I had a particle accelerator, and I was accelerating an electron. Would it on each moment be creating a new photon? What if it's accelerating both momentum, and direction(circular accelerator) vs. straight accelerator(straight line). Does a proportion of the energy put into acceleration turn into photons? Also, say the electron is constantly accelerating in a circle, what defines the start of one photon and the end of another. It's creating an oscillating electric field, and photons are particles, how many particles are there? Thank you in advance.