Suppose we take there are one electron and one proton, they attract each other by exchange of virtual photon of energy ∆E and it exists for ∆t. From where virtual photon gets energy ∆E? Is it from electron or proton?if it gets energy from electron or proton, will the energy of electron and proton also change? There are so many electrons and protons in this universe and every electron and proton interact with every other electron and proton so there are many virtual photons floating here and there in the universe. Is this true? if so then, there would be almost infinite energy going with these virtual photons? from where these virtual photons getting energy?