I'm currently an engineering student and will be minoring in physics. My question is, since the first 2 years of engineering and physics are very similar at most schools and I will be adding physics classes on with my minor, how feasible and how long do you think it would take to knock out the rest of the physics classes needed to receive a bachelors in it after I've finished with engineering? (First off, sorry if this is in the wrong forum) I'm a mechanical engineering student (3rd year) and a wannabe physicist. I don't plan on making a career out of physics outside of what is needed for engineering (not yet at least) but I'd love to have a rich understanding of some of the more theoretical stuff and the cutting edge research that's being done today. Being a mechE student, I'm confident that I can pick up the extra math that is required on my own time (or maybe as an elective) to start self studying things like quantum mechanics, quantum field theory, etc. but I don't know where to start. What math topics should I be looking at (that would come after calc, diffEq and linear algebra) and what are some good textbooks? Any other suggestions?