In three years im going to graduate school to get my phD in physics . However im confused in what goes on there. If you guys could tell me what it is/was like while answering these questions it would be much appreciated... 1)Do you specialize in a certain field of physics? 2) How long does it take to graduate? 3) How many courses do you generally take in a semester? 4) and can you take other courses like math beyond what is required? (I would love to take more math courses) 5)What tests do you have to go through besides finals? 6)At the end of your last year what do you have to do to get your phD?