Hello, I am attending the Modern Physics class at my college, and I am struggling to process all of the information the instructor is presenting. Part of that confusion stems from this being a summer course, the other part is from the sheer lack of organization. One second were deriving a formula and the next he says its obsolete, vaguely at that. So I was wondering, if any one here who has had modern physics before, would like to share their formula sheet(I found some on Google but they were not complete). Anything at all would be useful, and would aid in my understanding of the class. Thank you.