College physics is mainly self-study. If you are in class, you can't understand it unless you learn it twice. Landau once said that giving lectures in college is like playing the flute at a flock of sheep, which is what we call casting pearls before swine.
Find your own information, watch your own videos and do your own exercises. Don't expect to understand in the world. I just went to class to deal with the roll call.
If you read materials, read more classic textbooks.
If you watch videos, you should also watch classics. You can watch it again and again without worrying about being distracted.
Exercise is necessary.
You can't learn physics without much discussion. Visit forums more often. Such as Nova Inn, Theory of Relativity and so on. There are many basic physics topics in it.
There are about seven courses in electronic science and technology and physics.
Basic physics, quantum mechanics, thermodynamics and statistical physics, electromagnetic field and electromagnetic wave, solid state physics, semiconductor physics, semiconductor device physics.
Basic physics is about high school physics, and then explain it again with advanced mathematics. The textbooks used here are: Landau's It can help beginners, but it is not suitable for beginners. This is for researchers. A classic example of solving problems is beyond beginners' comprehension.
Video, just use Yang Zhenning's.
If you do exercises, use the exercise book issued by our school, because that's where the final exam comes from. In addition, we should study the examination papers of previous years. The test scores in each chapter will not change. For example, I got 20 points in the second chapter of the year before last, and I'm sure I won't get 10 this year.
Electromagnetic field and electromagnetic theory. Actually, it's about electrodynamics. The course of electromagnetic field only adds a chapter on conducting electromagnetic waves, which is nothing more than Dirichlet problem of Helmholtz equation. Mathematical and physical equations are well studied, so there should be no problem.
Quantum mechanics. In fact, the introduction of quantum mechanics is more difficult, but it is easier to learn than theoretical mechanics and general relativity-only elementary quantum mechanics, of course.
It is suggested that the steady-state judgment conditions of wave function and the relationship between commutativity and conservation of operators should be clarified first. Dirac operator will be used to represent quantum states.
These three questions are clear, that is, quantum mechanics is an introduction.
Dirac, < Feynman Lecture on Physics. Volume 3 >: Zeng Jin or Zhou Shixun are both good.
Video, Su Rukeng or Qian Bochu are all good.
The exercises are Zhou Shixun's and Zeng's, and they should all be done.
Thermodynamics and statistical physics
Thermodynamics and statistical physics mainly solve fully differential equations. Do more exercises.
Thermodynamics is not so good, and statistical physics is simply nagging. Statistical physics is to establish the mapping from macroscopic parameters to microscopic particle numbers. Specifically, the macroscopic temperature is mapped to the microscopic particle state number.
Then the entropy, enthalpy and free energy are directly obtained by using the state function.
That is to say, in thermodynamics, we use t, p, v, p, v to find entropy, enthalpy and free energy. In statistical physics, entropy, enthalpy and free energy are all directly calculated by state function β.
However, it should be noted that there are three cases of state function β, namely Boltzmann, Bose and Fermi.
The recommended book is from Wang Zhicheng, and Li Zhengdao is recommended. , and Landau; For reference.
Solid state physics
Solid state physics mainly studies crystals. The crystal is divided into two parts, one is the unit cell and the other is the near-free electron.
A unit cell is a group of atoms arranged periodically in space, and only slightly resonates (of course, this is only a second-order approximation).
The near-free electrons are caused by the diffraction effect of the crystal cell, which produces a standing wave inside the crystal-this is the energy band.
The periodic arrangement of crystal cells is studied, and the lattice arrangement is diffracted into different patterns by X-ray diffraction technology. What needs to be paid attention to here is the concept of inverse lattice, because the inverse lattice parameters are used when discussing the electron diffraction suite inside the crystal.
Study the concepts of cell vibration and phonon production.
The concepts of free electron motion, work function and contact potential difference are studied.
The motion of near-free electrons is studied. Bloch waves are generated by cell diffraction, and energy bands are generated by decomposing Bloch waves. We should learn perturbation method and tight binding method.
The recommended video was submitted to Professor Li from Jiaotong University. The video of Shandong University is mainly based on reasoning, which is not suitable for beginners. The recommended textbooks are Fang Junxin and Huang Kun's. The recommended exercises are the solutions of Shandong University and Wu Dynasty.
Semiconductor physics
Compared with the above physics class, semiconductor physics is relatively simple, with only one law. Is to calculate Fermi distribution.
In the end, the external influence is nothing more than producing an energy level, a doped energy level and a quasi-Fermi energy level, which will lead to the redistribution of carrier concentration.
The carrier concentration is recalculated by using the density distribution, and then the conductance function is calculated by using the carrier concentration.
The suggestion is to learn the textbook from the exercises, and then know what the formulas in the textbook really want to do.
The recommended textbook is Liu's; Shi Min:
Physics of semiconductor devices
This is not my direction, so I dare not say more.
Recommended for Shi Min: