> The system acts an an informal IQ test Undergrad textbooks in Physics may be somewhat challenging. But the graduate texts (at least in theoretical Physics) t

> The system acts an an informal IQ test Undergrad textbooks in Physics may be somewhat challenging. But the graduate texts (at least in theoretical Physics) tend to be MUCH harder, especially if your undergrad degree didn't include several courses of abstract algebra and topology. Ideally, physicists should have Geometric Algebra (Clifford Algebra) as part of their undergraduate classes. But at least when I went to Uni, there was no space in the undergrad tracks for this level of math.