I had a bad semester and I got very low grades from junior class Quantum Mechanics and Electromagnetism. I am not sure if I should take the sequel classes. Do you think one could handle QM II albeit knowing not so much about QM I? And what about Eletromagnetism as well? I know it's probably not the case like freshman physics where Physics I and Physics II are not very related but I wanted to check anyways.
I also like to take a class in Relativity (undergrad) and which topics and I am not sure which topics of Electromagnetism 1 I should cover to get ready. It's holiday and professors are unlikely to respond, so I just wanted to check it out here before going them.
Thanks for reading