Hi, i am doing an introductory course in quantum mechanics (that would be equal to first two chapters in griffith's quantum mechanics). I have the doubt that what exactly do we consider in quantum mechanics. Let me say like the electron is a particle and when we will observe it will have a defined position, and otherwise it may have been in superposition of various positions according to its probability wave. I guess thats the copenhagen interpratation. But is that the way we speak of dual nature of matter, like the way we are taught de broglie's hypothesis we say if waves have dual nature particle may also have dual nature with the argument of Symmetry. But in that case I guess and i feel that the way we have dual nature in electromagnetic radiation, we must have dual nature of electron same way. The wave associated with matter is only a probability wave. That wasnt the way i thought about dual nature, it was somewhat like electron is a well particle at sometime and a wave at some time like photons or other way i.e. like photons also have some probability associated in form of wave and things like collapsing etc. And more general i guess we must have fundamental equation applying both for radiation and matter, even if photons are mass less. Please point out conceptual mistakes! and i know interpretation of quantum mechanics is a big job not so at basic level. Does quantum field theory have provide some solution to this wave particle problem.