Under the condition of A=B, when a photon collides with an electron, there is always a certain probability that the electron will fall in the c=d region in the photon electric field, resulting in the Compton effect.
Under the condition of A-B, when photons collide with electrons, electrons always have a certain risk of falling in the c-d region in the photon electric field, resulting in the Compton effect.
Under the condition of a = B, when the photon collides with the electron, the electron always has a certain probability to fall in the C = D region in the photon electric field, resulting in Compton effect.<br>