Woodgate's team electron diffraction experiment, eleventh.

The voltage is raised to 47 volts, and the nickel target is in the A direction.

Li Kangping personally operated this experiment, and he obtained the eleventh set of curves, and the result of quantitative calculation was 1.18.

If the result is 1, it is extremely perfect.

Considering the acceptable deviation, 1.05 or 0.95 can also prove the validity of the matter wave theory.

The results of the total solar eclipse observed by the Eddington team in 1919 matched only 30% of the theoretical values, so until now, some people still question the theory of relativity.

Electron diffraction experiments, we do 0.95~1.05, which should be able to shut them up.

"Allen, you're here, you've worked hard tonight until tomorrow morning, I hope the twelfth set of data can be a little better."

Li Kangping and Allen handed over shifts, then changed into sports suits and came to the open-air basketball court of Columbia University.

Although he is busy with academics and business, Li Kangping has never interrupted his physical exercise.

Kangping must maintain a strong and healthy body and a sunny and energetic appearance, and he should delay aging as much as possible.

No matter whether Kangping is twenty or thirty, seventy or one hundred years old, it is necessary for his appearance to remain young at all times. He must not be old and hunched over, otherwise he may lose a large number of readers.

Li Kangping often plays basketball, and he hopes that Liu Shaowen, who loves basketball, can play with him.

After becoming a shareholder and chief financial officer of Zeus in Manhattan, Liu Shaowen basically never played basketball.

Returning to the court, Liu Shaowen played in the most strenuous way, and his work was very stressful, and he needed to relieve the pressure through sports.

Bang!

Brush!

Syllable!

Liu Shaowen and Li Kangping went head-to-head one-on-one, and the two fought until it was dark, hearty.

"Brother Shaowen, next time five to five." Li Kangping sat under the basketball hoop, took off his vest, and wrung out sweat.

"Five to five, fine." Liu Shaowen lay on the ground gasping for breath, he said: "If the bank does not approve the loan, the company is in danger." ”

The more than $80,000 of the Manhattan Zeus Company can only last for a few months, and as Liu Shaowen said, if there is no loan, it will go bankrupt this year.

The loan is being processed, and the bank's asset estimator will go to the Manhattan mahjong factory to investigate these days.

The purpose of the loan is to sustain life in the short term, and the long-term life depends on the sales of Hera mahjong.

"Arrange for workers to continue to make inventory, and I will handle the sales of Hera brand mahjong." Li Kangping calmly gave Brother Shaowen a reassurance.

Li Kangping can't say for sure whether the reassuring pill is really reassuring, after all, doing business is risky.

After playing basketball, Li Kangping and Liu Shaowen had dinner together at a small restaurant next to Central Park.

Liu Shaowen is a native of Jiangsu and is 27 years old this year. He went to the United States in 1917, and he married his daughter-in-law in 1915.

In China in the early days of the Republic of China, it was not up to you to decide who you marry or who you marry, but by your parents.

Liu Shaowen married his parents in 1915 and had a son in 1916.

The incense of the Liu family was continued, and the task of Liu Shaowen's inheritance was completed, so he obtained the approval of his parents and went to the United States to study in 1917.

As far as Li Kangping knows, Liu Shaowen has been in the United States for five years, but he has never returned to China, and his wife and children have never been to the United States.

"Does Brother Shaowen miss his wife and son?" Li Kangping asked.

"Naturally, I am worried." Liu Shaowen said emotionally.

After a Chinese woman gets married, she teaches her husband and children at her in-law's house and serves her in-laws.

Liu Shaowen wants to bring his wife and children to the United States, and the sister-in-law of the Liu family also has this idea.

However, Liu Shaowen's parents did not agree with the daughter-in-law and grandson leaving the small county town in Jiangsu, so Liu Shaowen could only obey his parents.

Li Kangping thought that Liu Shaowen was highly Americanized.

I never thought that Liu Shaowen lived in the depths of his soul with a dutiful son.

The so-called filial piety is not just kowtowing to parents. All major choices in life must be made to their parents, and their approval can only be implemented.

This involves a problem, Brother Shaowen is afraid that he will return to China to settle down, and it is impossible for him to live separately from his wife and children for the rest of his life.

I hope that before returning to China, Brother Shaowen can assist me in operating the company to a stable and rolling economy.

Li Kang calmly told that he once had a wife...... Oh no, fiancée.

said that when Li Zhuxi was nineteen years old, his parents arranged a marriage for him.

His fiancée is from Xiangshan, and she was thirteen years old when she got engaged.

Li Zhuxi and the girl's marriage has been engaged, and the two families agreed that when the thirteen-year-old girl grows to the age of fifteen, Li Zhuxi will marry her.

The girl drowned at the age of fourteen.

A few months later, Li Zhuxi was qualified to stay in the United States at official expense, and the next plot was told by Li Kangping.

His fiancée is dead, and Li Kangping is still single.

Bachelors are free, and bachelors have the right to choose their own love on their own initiative.

After dinner, Li Kangping returned to the apartment on Morning Street, his lover tonight was physics.

[In order to describe the transition between the two energy levels, Einstein established the theory of emission and absorption of radiation in 1917. 】①

（①A.Einstein，Phys.Zeit.18（1917），121.）

[On the basis of the theory of radiation emission and absorption, I try to propose a new concept: stimulated emission. 】

[According to the requirements of conservation of energy, and considering the situation of thermal equilibrium, the energy density of the radiated field in the unit frequency range can be deduced Uν=A21/B21·1/e^hνγkT-1.] 】

[The ratio of the spontaneous emission coefficient to the stimulated emission coefficient is A21/B21=8πh/λ^3.] 】

……

Did I tell you that the main direction of Li Kangping's doctoral students in the previous life was lasers?

A second before Li Kangping crossed over, he was doing laser experiments in the laboratory of Tsinghua University.

Regarding lasers, Li Kangping has special feelings.

The basic concept of laser was proposed by Albert Einstein.

Einstein first introduced the concept of stimulated radiation on the basis of the old quantum theory and established the theory of radiation emission and absorption. (1917)

T.H. Maiman of Hughes Laboratories in the United States developed the world's first laser (1960), and Mayman is considered the "father of lasers".

From Einstein's first basic concept to Mehmann's first ruby laser, it took more than 40 years.

Laser from scratch, its theoretical improvement, technical route exploration, the birth of application products, is a long and complex journey of exploration.

Lasers did not exist immediately, before the advent of lasers, their predecessors were microwave masers.

The microwave maser was born in 1954 by American physicists Townes and Soviet physicists Basov and Prokhorov. Together, the three fathers were awarded the Nobel Prize in 1964.

Before the advent of the microwave maselter, we needed a theoretical concept --- stimulated emission.

The academic term stimulated emission was coined by J.H. Van Vleck in 1924.

In the spring of 1922, Li Kangping drafted a new paper in New York--- "Inspired Ejaculation".

"Stimulated Emission" does not seem to have anything to do with "Matter Waves", but has a certain academic continuity with Li Kangping's first paper "Black-body Radiation and Light Quantum".

In other words, "Blackbody Radiation and Light Quanta" has been forgotten, to be precise, Li Kangping's debut work has never been taken seriously by the vast majority of scholars in the academic world.

【…… Bringing the above equation into (16-1) formula, we get Planck's formula for blackbody radiation ......]

【…… According to the previous derivation, without the introduction of stimulated emission, the "-1" in the denominators of Eq. (15-2) and Eq. (17-1) would not exist, which would lead to a conflict with Planck's formula......]

Li Kangping wrote late into the night, and considering the publication cycle of the paper, he thought it was necessary to finish writing "Stimulated Shot" in the near future.