we say that photons are mass less (so don't exist in reality - no matter). Then how-come there are photon - electron interactions.(using debroglie and Compton formula-If a high energy photon interacts with an electron, the interaction can be described by the Compton scattering relationship or by the 4-vector formulation of relativistic momentum.)

we say that photons are mass less (so don't exist in reality - no matt

1.	we say that photons are mass less (so don't exist in reality - no matter). Then how-come there are photon - electron interactions.(using debroglie and Compton formula-If a high energy photon interacts with an electron, the interaction can be described by the Compton scattering relationship or by the 4-vector formulation of relativistic momentum.)
Answer» we say that photons are mass less (so don't exist in reality - no matter). Then how-come there are photon - electron interactions.(using debroglie and Compton formula-If a high energy photon interacts with an electron, the interaction can be described by the Compton scattering relationship or by the 4-vector formulation of relativistic momentum.)