As soon as Milligan said this, everyone was silent.

It was a bit embarrassing, for Li Kangping and Woodgate were busy and painstakingly organising the lecture, and after Professor Chemberg asked a question that "didn't seem to be smart", no one asked any more questions.

"Do you have any questions for me, Mr. Lofes?" Li Kangping took the initiative to ask physicists questions.

"Let's move on to the presentation of the experimental part." Avoiding Li Kangping's direct gaze, Mr. Lopis looked around and asked, "What do you think, gentlemen?" ”

"Let's do it." Said the gentlemen.

This was followed by Woodgate's presentation on the experimental part: "In order to prove that moving particles have wave-wave, /mv, we designed two different experiments at the beginning of 1922 and the end of 1922, and obtained experimental evidence in the summer of that year. ”

"Let's start with the low-energy electron diffraction experiment, we used a nickel crystal as a target, and the voltage was gradually increased from 44 volts to 72 volts...... ...... We have synthesized hundreds of curves, and we have found with certainty that this is the diffraction phenomenon that occurs when the electron beam hits the nickel crystal. In this way, we fully confirm the existence of electron diffraction, providing important evidence for the theory of matter waves. ”

Professor Woodgate paused after reporting on the low-energy electron diffraction experiments.

The meeting scene was suddenly lively, and physicists were talking about it. It seems that American physicists are still more concerned with experimental physics, and have a deeper understanding of experimental physics.

The first physicist to speak was Arthur Compton, who said: "I visited Woodgate Laboratory in the fall of 1922, and I can say with one hundred percent certainty that their experiments with low-energy electrons were extremely elaborate, and that their equipment was only five inches long and two inches high. ”

"There is no doubt that the low-energy electron diffraction experiment provides real and credible evidence, as Professor Woodgate said, through this experiment, they proved that moving particles have wave properties, /mv. This is a great contribution to be celebrated! Arthur Compton combined his personal experience to talk about his academic views objectively and fairly.

"The Woodgate Laboratory paper on low-energy electron diffraction experiments was published a year ago, and I have read it, more than once." Professor Duane said, "Leaving aside the validity of the theory of matter waves, let's just talk about low-energy electron diffraction experiments. The experiment itself provides a new experimental approach, and when we found that the electron beam in contact with the crystal produces the phenomenon of interference diffraction, it shows that this discovery fundamentally expands our understanding of the nature of electrons. As you all know, I mainly work in X-rays, and I must admit that with the advent of low-energy electron diffraction experiments, X-ray methods were an extremely important complement to them. Not an exaggeration? Low-energy electron diffraction experiments are Nobelium-level experiments. ”

Duane and Compton had disagreements and arguments on X-ray diffraction experiments? Of course, they're reconciled now.

On the project of low-energy electron diffraction experiments? Duane and Compton agreed? They fully affirmed the low-energy electron diffraction experiment and spoke highly of it.

Professor Ross of Stanford University asked, "Professor Woodgate?" I was wondering, how do you stop electrons that have undergone inelastic collisions from entering the collector? Do you have a schematic diagram in your paper? But I wanted to know more about the process of experimentation in more detail and specificity. ”

In this era, physicists mainly studied the internal structure of matter by experimental methods such as X-rays, α-rays, and γ-rays.

Physicists who specialize in these experimental methods? More or less interest was taken in the new experimental technique of low-energy electron diffraction experiments.

Professor Woodgate patiently explains: "The scattered electrons are collected in a double-layer Faraday cylinder, insulated with quartz between the inner and outer layers of the collector, and we apply a reverse voltage...... How do I explain it? Will it please Professor Ross? ”

Professor Ross suddenly realized: "I see? That's how it was! Amazing experiment, this is an amazing experiment! If possible, I look forward to visiting your lab! ”

Woodgate said with a smile on his face, "My pleasure." ”

The lecture will be switched from theoretical physics to experimental physics, and the season of the conference site will change from cold and silent winter to warm and warm spring.

Pure Matter Wave Theory Lecture Session, Can't Be Said to Be a Success? Nor can it be said to be a failure.

They are silent, they don't ask "smart" academic questions? Nor is there a clear stance for or against.

Therefore, Li Kangping did not know whether the theoretical part he was responsible for was deeply rooted in the hearts of the people and thought-provoking, or whether it was immediately forgotten after blowing like the wind in his ears.

Do all the physicists in this room know? There are two authors of the paper on the low-energy electron diffraction experiment, one is Woodgate? The other is Li Kangping.

Unlike other physicists? Li Kangping himself proposed the basic theory? Do experiments on your own to test his hypothesis.

In the lecture on the theory of matter waves, theoretical physicist Li Kangping seemed to have been left out in the cold.

In the lecture session on low-energy electron diffraction experiments, experimental physicist Woodgate was quite popular.

During the coffee break, Li Kangping, who switched to the identity of an experimental physicist, gradually returned in popularity.

Outside the side door of the British reign-style villa, Li Kangping holds a delicate teacup with milk in his cup.

"Dr. Li, I thought about it seriously, the question I asked you in the morning can indeed be explained by Bohr's quantum theory." Professor Chembao lit a cigarette and said, "Now let's talk briefly about the electron diffraction experiment, what do you think is its limit? ”

Li Kangping gave a thumbs up: "I think it can easily study the crystal structure with a mass of less than a microgram." ”

"Really? Maybe when I get back to Harvard, I should try. Professor Chembao said thoughtfully, and then he introduced the young people around him to Li Kangping: "This is Dr. John Slater, he is my student, and he has just received a doctorate from Harvard University. Dr. Slater, the most promising physics student we have seen at Harvard in many years, has been awarded a one-year visiting scholarship from Harvard, which will be followed by a fellowship to Cambridge. ”

"Dr. Slater, are you alright?"

"Dr. Lee, it's a pleasure to meet you."

Li Kangping shook hands with Slater.

John Slater was not tall, and his face was chubby, the kind of ordinary white American appearance that could not be more ordinary.

"Here's my business card." Li Kangping handed John Slater a business card.

"Zeus Labs, Dr. Lee." Slater accepted the business card and asked, "Dr. Li, if I'm not mistaken, the TV was invented in your lab, right?" ”

"Yes, we invented television." Li Kangping finished drinking his tea and said: "The experiments of matter waves and electron diffraction actually have nothing to do with television. As you know, I'm more passionate about academic research, and I hope that one day, we will have the opportunity to collaborate with Harvard University on an academic basis. ”

After a short coffee break, the physicists who came out to breathe returned to the conference room one after another.

The final part is the high-energy electron diffraction experiment, which continues with Professor Woodgate's lecture.

"We have just finished our high-energy electron diffraction experiments and are working on our paper. The information in your hands is the experimental schematic diagram, the summary of the design ideas and the representative experimental data of the high-energy electron diffraction experiment. In this experiment, the electron beam is accelerated by voltages of up to tens of thousands of volts, with an energy equivalent to V, and the electrons penetrate the solid foil, directly producing a diffraction pattern. ”

"In addition to the higher energy, the difference from the low-energy electron diffraction experiment is that we use polycrystals instead of single crystals. The diffraction patterns we observe are concentric rings, and these patterns are similar to those obtained by the X-ray Debye powder method, but they are not the same in nature......"

“…… Therefore, the magnitude of these diffraction patterns is in good agreement with the predicted values of the matter waves. As you can see, it took us a year and a half, using two different experimental methods, to get conclusive evidence that matches the theory of matter waves! Gentlemen, once by chance, twice by necessity! That's the end of my speech, thank you! ”

The more Professor Woodgate spoke, the more excited he became, and the excitement reached the limit, and his presentation ended.

Although the formal paper on the high-energy electron diffraction experiment has not yet been published, Woodgate presents the core experimental data.

The physicists who attended the meeting were once again enthusiastic, and they expressed their opinions and asked many questions.

"High-energy electron diffraction experiment! Oh, it looks like this is another Nobel Prize! This is a completely new experimental technique! A physicist at Brown University shouted.