Is that true? Becuase like my prof said that the resistivity of an object according to ohms law has nothing to do with certain factors when in reality it does such as current and electric field (i think) What is this field of QM called? Is it Quantum Electrodynamics? Can you suggest textbooks or books that would be a good read ? Note : i'm only in the second year of university - but i'd like to start this sometime!