I am a student currently doing astrophyics as a independent study at a high school. My question is related to photon "birthing". When an atom drops from a high energy to a low energy state it releases photons. When these photons are "created" what propels them to c? I am quite aware that photons do not accelerate as they do not have mass. But what allows photons to achieve that instantaneous speed of light with no acceleration and break out of the electron cloud of the atom?