And what determines the wavelengths of the emitted photons? In jumping from one orbital to a lower one, how many photons does an electron generally emit? Is it just one, with a wavelength determined by the distance jumped between orbitals, or many? In the case of an electron being accelerated in free space, does it emit a constant stream of increasing frequency photons, and how far must the electron travel in order to emit a photon? Thank you.