"Continuing with the example of self-reliance, do you know who introduced the mathematical description of particle motion trajectories?"

"Klero." Wu Bin replied.

After listening to Wu Bin's answer, Professor Pan Jianwei was obviously stunned, "Have you read his paper?" ”

"Yes, I've read his papers on geometric curves and the concept of curvature."

"How did you think to read such an old paper?" Professor Pan Jianwei asked with interest.

"I once looked up a document from 1935, a paper from more than 80 years ago, when I was researching the black phosphorus material, but the research in it still has great guiding significance for me, so I realized that the wealth of knowledge is really a very eternal thing, and then I became very interested in those classic papers."

"Hahaha." Professor Pan Jianwei couldn't help laughing after hearing this, "No wonder those professors in the school have praised you for me, now I understand a little." ”

"Then if you know about Korero, you should know something about his academic career, right?"

Wu Bin thought for a while and replied, "Specifically...... I don't fully understand either, I only know that he was elected a member of the French Academy of Sciences at the age of 18. ”

To say how hardcore the academician of the French Academy of Sciences is, simply put, Marie Curie, who has won two Nobel Prizes, is not eligible to be selected because she is not knowledgeable.

The second generation of the top scientists, De Broglie, proposed the concept of matter waves in his doctoral dissertation in 1924, and subsequently won the Nobel Prize in Physics in 1929, but it was not until more than a decade later that he was finally elected a member of the French Academy of Sciences under the operation of his mayor's brother.

This is enough to see how wicked Klero is, who can be elected a member of this academy at the age of 18.

"Okay, now that you know, I won't go into more introductions, well, to give you an analogy, since you have studied quantum mechanics, you must know that there is an important concept called the Pauli matrix."

This time, Professor Pan Jianwei did not plan to ask Wu Bin another question, but directly said it himself.

"Pauli wrote two papers during the vacation when he finished his college entrance examination and waited for his admission letter, which laid the foundation for him as an expert in the theory of relativity."

"Therefore, when he first reported to the University of Munich, the famous professor in Munich Sommerfeld directly told him that you are already at the level of a doctorate, but according to German regulations, a person can only apply for a doctorate after at least six semesters after entering the university."

Speaking of this, Professor Pan Jianwei suddenly glanced at Wu Bin, as if hinting at something.

"Pauli didn't graduate early after that, but Sommerfeld told him that you can't just hang around with me for six semesters, and you can find him some work, and that job is a German mathematical encyclopedia writing about the theory of relativity."

So Mr. Pauli, who had just entered his freshman year, began to write a literature on the theory of relativity, which was officially published in his junior year, and the 237-page book of the relative paper is still a classic in this field.

"Well, I've seen it, and it's really good." Wu Bin nodded vigorously.

"Alright, I know you're good." Professor Pan Jianwei smiled and nodded, "Then let me ask you another question, do you know the relationship between the Pauli matrix and the theory of relativity?" ”

"Are you referring to the Pauli matrix plus the unit 2*2 matrix as the distance formula in relativity?"

“……”

Professor Pan Jianwei was silent for a while after hearing this, "Although I used genius as an example, if I think about it carefully, these are all things that European high school and freshman students should know, but too many people in my country suddenly understand a little bit after being professors for more than ten years." ”

Looking at Wu Bin's serious nod, Professor Pan Jianwei smiled helplessly and said: "Actually, I want to say some words of warning to you, such as devoting yourself to such a basic science as physics, you should broaden your scope a little, don't think that you don't need to know a little about relativity if you study condensed matter experimental physics." ”

"Go a little deeper into it, find out how deep the water is, and maybe you can calm down and do something."

"But it seems like this admonition is a bit redundant to you."

After hearing this, Wu Bin hurriedly waved his hand: "How come, I will keep the professor's golden words in my heart." ”

"Hmm...... It's not a bad thing to remember two more sentences. Professor Pan Jianwei nodded with satisfaction, "Let's talk to you about my own field, what we are studying now is the most microscopic world, but we need the most macroscopic knowledge of the entire universe." ”

"So in my mind, physics is like a snake, the tongue of the snake is a physical problem at the cosmic level, and it is physics at the level of elementary particles, the most macroscopic head, holding its most microscopic tail."

After hearing this, Wu Bin couldn't help but fall into thought.

"Physics? Still is...... Philosophy? ”

……

Interesting chats can always make time pass very quickly, and Wu Bin, who has five cups of tea, can't help but want to go to the toilet.

When Wu Bin came back from the toilet, Professor Pan Jianwei stood up and said to him, "It's almost nine o'clock, let's have a meal together." ”

"Okay." Wu Bin nodded happily.

During the meal, Professor Pan Jianwei raised a new topic, "Physics studies the invariance in change, and a simple Tim of a mathematical paper makes the core idea of physics clear." ”

"Do you think math is hard?" Professor Pan Jianwei took a bite of braised pork and asked Wu Bin.

"It's hard, but it's fun." Wu Bin raised his head and replied seriously.

Professor Pan Jianwei nodded slowly twice after listening, "Many people often say that it is indeed very difficult to ask physicists to learn so much mathematics like mathematicians, and even Hilbert said enough of a very famous and helpless sentence. ”

"Physics is so hard for physicists!"

"Do you know why he said that?" Professor Pan Jianwei's interest has changed from these few hours of conversation, and his pursuit is not to ask the big boy in front of him, but to be happy that every question he throws up seems to be answered.

"Because he knows that physics requires a lot of mathematics, which is difficult for physicists to master, in fact, the relationship between mathematics and physics, many people have talked to me, and I also have some ideas of my own."

"Oh? Let's talk about it. Professor Pan Jianwei asked with a little expectation.

"A lot of mathematical knowledge is indeed difficult for physicists to master, but on the other hand, the beauty of equations, or mathematics, is really not something that mathematicians can see, and the real beauty of mathematics must reflect our real physical world, so we still need to use the eyes of physics to see where its beauty is."