The interaction between electrons is doing by quantum of light . / Today?s opinion. / # The interaction between quantum of light and atom. A simple atom is : electron + proton + empty space (!?). One of four things can be happened: 1 The photon gives up its energy to an electron located in the atom. Armed with this extra energy, the electron is able to move to a higher energy level. ( and the photon disappears - where is photon now ? ) / In this situation, when a photon hits an electron, it is like a railway train smashing into a baby- carriage.?/ 2 A gamma photon with much more energetic would strongly kick the electron out of the atom (and might even produce electron/positron pairs in the process). / In this situation, when a photon hits an electron, it is like a railway train smashing into a baby- carriage.?/ 3 The photon gives up its energy to the proton . Proton is about 2000 times heavier than electron. Maybe in this situation the poor photon is smashing now . . . . . . . . and it will be hard to him to radiate back. 4 . The empty substance (!?) allows the photon to pass through unchanged. Known as transmission, this happens because the photon doesn't interact with any electron or proton and continues its journey until it interacts with another object. ===.. All four scenario are speculative because we don?t know what photon and electron are and where the proton mass come from. == ?. P.S. 1900, 1905, 1913 Planck, Einstein and Bohr found the energy of electron as: E=h*f. 1916 Sommerfeld found the formula of electron : e^2=ah*c, 1928 Dirac found two more formulas of electron?s energy: +E=Mc^2 and -E=Mc^2. According to QED in interaction with vacuum electron?s energy is infinite: E= ? The energy of electron in the simplest atom is: E= - me^4/ 2h*^2 = -13,6 eV The negative mark of energy shows that electron is tied in atom. Questions. Why does simplest particle - electron have six ( 6 ) formulas ? What is interaction between them? =======..