In fact, there are not many things in undergraduate physics. Since I am very interested, I must have read a lot of popular science, so I don't think it is necessary to read more popular science. Down-to-earth study textbooks.

There are two stages in undergraduate physics: general physics and classical physics.

The general things are force, heat, light and electromagnetism, and high school mathematics is enough.

After that, I have to learn some mathematics, just two: advanced mathematics (mainly calculus and line generation) and mathematical methods.

Then you can study four courses of classical physics: theoretical mechanics, electrodynamics, thermodynamics and statistical physics, and quantum mechanics.

Ps: Actually, the real understanding of special relativity is the study of electrodynamics, because if you don't study electrodynamics, you can only look at the mechanical part of the narrow phase (that is, scale contraction, time expansion, twins, etc., and your ears must grow cocoons). The real meaning of the narrow phase is the relativistic form of electromagnetic field (Einstein's paper is called "On Electrodynamics of Moving Objects"). So, what I want to say is that you can look at some narrow pictures now, but it's hard to see through them.

Here, in fact, the undergraduate course of theoretical physics is over.

These courses, I think, no matter how awesome you are, are enough for you to study for three years. If you really have not only studied these courses, but also been admitted to a good physics department, and want to continue studying theoretical physics, such as string theory, you can take some postgraduate courses in advance to make up for math.

First of all, the required courses for graduate students of theoretical physics are: advanced quantum mechanics, general relativity and quantum field theory (these three are necessary for superstrings)

At the undergraduate level, quantum mechanics is very good, and high quality is not a problem. The learning of wide phase needs differential geometry (which may also involve real variable function and tensor analysis, but it can be done without learning, but it is easier to understand), and the learning of field theory needs group theory (including Lie algebra).

Ps: The field theory is the most difficult course. Many students say that the field theory is not good, and it is inevitable to fail once. You have to use different textbooks to go through it several times.

Well, here, you can actually learn superstring, classic books such as Witten's Superstring Theory or Polczynski's String Theory, which has been criticized as very difficult to understand but very good at home and abroad. . . If you want to study the direction of superstring, you must read through this book.

There is no textbook that can help you at this point. Of course, you can also read a lot of books and broaden your horizons in the huge system of mathematics, which should be helpful for future research. . .

Pps: What I said is very simple, but just pick a subject and there will be four or five classic textbooks recommended, both in Chinese and English, so I won't mention them here. After reading these, if you are really determined, you may wish to start Baidu from scratch. . . Ferry. Ferry. . . There's still a long way to go, Xiu Yuan. . . . Hmm. How interesting

PPP: Last but not least, I must remind you:

Learn by yourself if you have spare capacity!

Otherwise, the gold medal list was not nominated in the college entrance examination, and I couldn't get into a good physics department, so my life pressure would be great. . . .