Physics is great, and the path to greatness is often boring, rigorous, and day-to-day experiments.

Most people have fallen or given up before reaching greatness, and to achieve greatness is not enough with a brilliant mind, but also requires almost perverted patience and a little luck.

For physicists, being smart should come first, and if you're not smart enough, it doesn't matter if you're patient or not.

Woodgate's team electron diffraction experiment, twenty-fourth.

Voltage 52 volts, nickel target A-B-C azimuth.

Li Kangping personally operated this experiment, he did not operate it every day, but today he wants to operate it.

As the saying goes, if you want to do a good job, you must first sharpen your tools. The Woodgate team spent a lot of time and effort on building and debugging the experimental setup, and now it is in its 24th experiment, and the experimental device is very reliable and has never dropped the chain.

Li Kangping maintains an acceleration voltage of 52 volts, and different voltages determine different wavelengths of electrons, and as the bombardment voltage increases, the wavelength of electrons becomes shorter, and the electron diffraction phenomenon is reflected in the observation results on the celluloid diaphragm that are constantly changing.

Under the voltage of 52 volts, Li Kangping adjusted the position of the nickel target once in a while, A-B-C, A-B-C, and so on.

The (111) side of the nickel target is the bombarded surface, which is always perpendicular to a normal ---- which exists only on the experimental design diagram, and then appears in Li Kangping's mind in a virtual form.

Li Kangping rotated the nickel target from A to B, and the angle between the normal and the incident electron beam changed from 45° to 35°. This angle can only be reduced to 15°, which is not empirical, because there is no previous experience.

The experimental setting of no less than 15 degrees was deduced by Li Kangping, and every clever experimental physicist will deduce it before the experiment begins, and the accuracy of the deduction is different.

The essence of the experiment is to keep trial and error, until the experimental value matches the theoretical value.

Li Kangping obtained a set of measured data, and he drew a curve diagram based on the data, the abscissa is the nickel target azimuth, and the ordinate is the collector current.

↙↘_へ↙↘_へ↙↘_へ

The above curve is the relationship between the elastic scattering intensity and azimuth of the 52 volt incident drawn by Li Kangping.

↙↘ The vertex of is the value of the direction of A, _ is C, and the vertex of へ is B.

According to this set of measured data, the scattering angle of the maximum value of the electron beam under the condition of 52 volts acceleration voltage is calculated to be 1.08 times that of the theoretical value of "Matter Wave". Hey Professor, Allen, this is the closest thing we've gotten to a theoretical result so far! Li Kangping said excitedly.

"Good, I feel like we're almost done!" Professor Woodgate was equally excited.

Approaching success does not equal true success, and Professor Woodgate quickly calmed down and said, "Alan, you clean up the lab and change shifts with Mark later." Li, you will accompany me to the faculty cafeteria for dinner now. ”

Li Kangping accompanied the professor to the faculty cafeteria of Columbia University, ordered meatballs, fried eggs and hot chocolate, and then had a simple dinner with the professor.

"Li, I heard that your other identity is the president of a certain company?" The professor asked suddenly.

The advertising slogan of Hera Mahjong that you deserve appeared in the newspaper, and Li Kangping's other identity was afraid that it could not be hidden.

In fact, Li Kangping never thought of hiding the identity of the president from the professor, and the professor never took the initiative to ask, so Li Kangping did not take the initiative to tell him.

At this time, Li Kang replied calmly: "Yes, professor, I am the president of a mahjong company. ”

"Mahjong company, oh, I don't know if it's a surprise or not, my smartest physicist actually started a mahjong business! I'm wondering, does mahjong have anything to do with matter waves or molecular beams? ”

The professor gave an exaggerated expression, then returned to normal, and he asked again, "I live in the Bronx, you know where my family lives, you went to my house to eat." So, you opened that mahjong factory five miles away from my house? ”

"That's right, it's that mahjong factory, and it's the only one in the United States."

"Li, is your mahjong company okay?"

"It's not good, it's not too bad."

"Your performance after your PhD is impeccable, and the United States is a free country, you have your freedom, and I have no right to interfere in your private life. Lee, I hope your mahjong company will be better, and I hope that business things will not affect your academic passion. The professor said earnestly, and he continued: "In a few days a European cruise ship will arrive in New York Harbor with a passenger named Hendrik Lorenz. Lee, do you know this Mr. Lorenz? ”

Li Kangping asked curiously: "That Lorenz in the Netherlands?" ”

"That Lorenz in the Netherlands."

"That Lorenz who won the Nobel Prize in Physics?"

"Yes, that's him."

"Oh, Mr. Lorenz is a famous Nobel laureate, who doesn't know Lorenz? Everybody loves Lorenz, and the great Lorentz transform. ”

"Lee, do you know that Mr. Lorenz came to the United States in 1905, the third year after he won the Nobel Prize, and from 1905 to 1906, Mr. Lorenz was hired as a professor at the Columbia Graduate School, and during that time, I happened to be studying for a doctorate at the Columbia Graduate School, and Mr. Lorenz taught me a lot and gave me a lot of inspiration. If it weren't for Mr. Lorenz's guidance, I might have given up physics. Professor Woodgate looked grateful and respectful, and he unabashedly admired his mentor, Hendrik Lorenz.

Understood, understood, you are Hendrik Lorenz's apprentice, and I am Hendrik Lorenz's apprentice. Li Kangping pondered carefully, it turns out that my teacher is famous, and I have an academic background, so I have something to do with the Leiden School?

Since the first Solvay Conference was held in 1911, the chairman of every subsequent Solvay Conference has been Hendrik Lorenz.

If Hendrik Lorenz had been healthy and long-lived, he would have been president--- at least until 1927.

"Mr. Lorenz is coming to the United States this time, and I would like you to meet him, and I think Mr. Lorenz should be interested in meeting with the author of Matter Waves."

"Yes, Professor, I am very much looking forward to meeting Mr. Lorenz. Professor, I would like to ask, is the purpose of Mr. Lorenz's visit to the United States for academic exchanges, or for vacations and visits to old friends? ”

"Maybe there are some factors in these aspects. Mr. Lorenz wrote to me that he had come to the United States for tourism, but a physicist like him could not have any pure pleasure, and his travels and vacations would have a certain academic exchange nature. ”

"Yes, Professor, I'll be carefully preparing for my meeting with Mr. Lorenz."

Li Kangping returned to his apartment on Chenbian Street, did a few problems on Lorentz transformation, and revisited Lorentz's full set of theories in his memory.