Rhode Island is the smallest state in the United States, bordering the Atlantic Ocean, with summer highs in the mid-twenties, and nights that cool down to the teens.

The manor was built by the sea, and in the evening, Li Kangping asked his brother to take a walk on the beach.

A beach where the tide is receding, with a light breeze and calm waves. Li Kangping and Brother Youxun stood on the beach, watching the sunset and not going into the water. The sea and the sky meet, the purple haze is vast, and the orange and red ripples at the intersection of the sunset and the horizon, which is quiet and beautiful.

APS is really good at selecting beautiful and comfortable venues for the annual meeting, whether it is a highland, or a sea view, or a forest, or a grassland, and every APS annual meeting is a high-end vacation and recuperation trip.

Arthur Compton's Compton Effect keynote session was a good one.

Although Arthur Compton repeatedly mentioned at the meeting that Wu Youxun had made great contributions to the Compton effect experiment, Wu Youxun did not say a word at the conference.

The statements were made by Arthur Compton, and various questions were answered by Arthur Compton. Wu Youxun just observed, listened, and recorded.

"The APS Annual Meeting is a rare opportunity, could it be that Professor Compton is not allowed to speak with Brother Xun?" Li Kangping asked.

"Not really. Professor Compton suggested that I give a report on the experimental part of the University, but I was afraid that I would be unclear and inaccurate, so Professor Compton gave the full report. Brother Youxun explained.

"I see."

Li Kangping learned that Arthur Compton intends to cultivate and promote Brother Youxun, so that Brother Youxun can shine on the stage of the ASP annual meeting.

However, some Xun brothers knew that the Compton effect was too important, and he was afraid that something would go wrong and affect the overall situation, so he did not speak.

Some of the physicists at the conference were tricky, and they asked questions that even Arthur Compton could not answer.

Brother Youxun modestly believed that his academic level had not yet reached a high level, so he came to study as a student.

Brother Xun looked at the ocean and said: "A certain gentleman once said that after restoring our inherent morality, intellect and ability, in today's world, we have not been able to enter China's first-class position in the world, and we still have to learn from the strengths of Europe and the United States. If we want to learn from foreign countries, we must catch up, not follow them backwards. ”

Li Kangping asked: "Having said that, how can you catch up instead of blindly following? ”

"In terms of physics alone, Kangping has made achievements, and Kangping no longer follows, but leads the way."

"Brother Xun, you and I all know that China's fundamental problem is not a physical problem."

"But what is feasible for us is only to listen to the ears."

The two talked from late evening until late at night, most of which was related to physics.

The next day, Woodgate and Li Kangping presided over a lecture on low-energy/high-energy electron diffraction experiments with matter waves.

The most important scholarly value of the Compton effect is to demonstrate the wave-particle duality of light.

However, not all physicists present at the annual meeting agree with the Compton effect and the wave-particle duality of light, and there are still physicists who support classical wave theory.

The question of whether light has wave-particle duality is not really solved.

Now let's explain the wave-particle duality of matter particles.

Li Kangping was the first to speak: "Everyone has seen "Material Wave", so I omitted the background statement ꓹ and talked about the climax directly. How does the phase wave propagation of an object when it is moving at variable speed in a force field? Instead of trying to determine the speed of propagation at a certain point in space and in every direction, as we did in the first place, we can generalize quantum relations......"

“…… In order to relate these two vectors, ꓹ/hJ4, i.e. one of the two vectors has an equal component, but this does not mean that the other components are also equal. ”

"So ꓹ I did a math that I thought was wonderful, /hJiꓹ then ꓹπOidx^i!"

"Gentlemen, you have seen it, you have seen it with your own eyes, she is wonderful!"

"Does anyone think she's not wonderful? No, yes, then I'll move on. ”

"Therefore, I have come up with the following formulation: Fermat's principle for material waves is equivalent to Moppet's principle for moving objects, and the dynamical possible orbits of moving objects are equivalent to the possible wave fronts of waves!"

"It's also too obvious that this idea of a deep connection between these two important principles of geometrical optics and dynamics can serve as an important guide to synthesize waves and quanta!"

"This is the end of the lecture on the theory of matter waves that I am in charge of, so please ask questions and discuss."

After Li Kangping finished speaking, the audience was silent.

The atmosphere at the lecture was so quiet that even Li Kangping himself was frightened.

"Gentlemen, do you need me to start with the background statement and repeat it?" Li Kangping asked cautiously.

"Ahem." Professor Duane cleared his throat and said, "I have nothing to ask, I even regret that I let you publish Matter Wave in the first place, and you can see that Dr. Lee's Matter Wave has made us fools who can't even ask questions!" ”

"Huh."

"Huh."

A variety of voices rang out at the scene.

At the beginning of 1922, before the publication of Li Kangping's "Matter Waves", Luo Feis, the editor-in-chief of "Physical Review", convened several physicists to hold a review meeting of "Matter Waves".

All those physicists are sitting here now, and Professor Duane is one of them.

It was more than a year since the publication of "Waves of Matter", and the paper on the low-energy electron diffraction experiment was published in the second half of 1922, and the data of the high-energy electron diffraction experiment were sent to Professor Duane in advance.

According to common sense, after absorbing and digesting for more than a year, and seeing the experimental evidence, Professor Duane should have asked many questions.

However, Professor Duane could not ask a single question.

"Dr. Li, I want to ask you." "How do you use your theory to explain the individual electrons in an electrostatic field?" ”

Professor Chembao once told Li Kangping in a letter: I may just be a simple listener, and I will not make any remarks.

Now, Professor Chembao couldn't help but speak.

"You shouldn't ask questions like that." The first to answer was Milligan, who said, "Professor Chemberg, a respected physicist like you should not ask such a question with such obvious answers. It seems to me that we don't need to use the theory of matter waves to answer your question, we can answer your question by using Bohr's quantum theory. ”

"Professor Duane is right, Dr. Lee's Matter Wave makes us fools." Milligan felt that the words were a little inappropriate, and he explained: "Professor Chembao, I don't mean you are a fool, I mean, if you really can't ask a smart question, then don't ask a question. ”