my scientific age

Chapter 238 Physics Gold Mine!
"Qian, I don't know your country, but what surprises will it bring me..." Feng Kamen closed the military document, looked out the window at the rapidly receding scenery, recalled the most proud student in his mind, silently in his heart Some hope.

The money comes from this ancient and great eastern country, Aiwu and Wu, and for this reason, Feng Kamen has a good impression of China.

The convoy progressed smoothly. This stop, if there is no accident, will go to Tsinghua Park.

During his first trip to China, during his academic visit to Tsinghua University, Feng Kamen explained to the school the importance of developing the aviation industry and aeronautical disciplines. Maintain a military balance with the Japanese.

However, his suggestion was not taken seriously by the then President Luo Jialun. Only when Mei Yiqi became the President of Tsinghua University did Tsinghua establish the School of Engineering and the Aeronautical Engineering Professional Group. During this period, it not only wasted more than three years of precious time, but also paid a lot of money. price.

The main reason why Tsinghua established the Aeronautical Engineering Professional Group was because of the September [-]th Incident that Japanese army aircraft bombed the ground with air superiority, as if it were unmanned, causing shock throughout China, from the public opinion circles to the academic circles, the aviation A cry for salvation.

As the world's top aerodynamic master, Feng Kamen sincerely hopes that his trip to China can bring something different to this country, so that they can truly understand the meaning of air dominance.

……

"nuclear physics, translated as nuclear physics, referred to as nuclear physics, mainly studies the structure and changing laws of atomic nuclei, as well as the properties and production of rays. In 1896, Mr. Becquerel discovered the natural radioactivity of uranium, which is the first time in human history. An observed nuclear change, usually defined as the beginning of nuclear physics, for which Becquerel and the Curies were awarded the Nobel Prize in Physics in 1903."

"After the discovery of natural radioactivity, physicists focused on the study of the law of radioactive decay and the properties of rays, and began to initially use radioactive rays to study atomic nuclei. For example, in 1911, Rutherford and others bombarded various atoms with alpha rays and observed alpha rays. The deflection of the ray has established the nuclear structure of the atom, and proposed the planetary model of the atomic structure, which has laid the foundation for the study of the atomic structure."

"In 1919, Rutherford discovered that the bombardment of nitrogen nuclei by alpha particles would release protons. Since then, the method of bombarding atomic nuclei with rays to induce nuclear reactions has gradually become the main means of studying atomic nuclei."

"So far, the physics community has discovered many types of rays, and initially created a series of detection methods and measurement instruments, such as cloud chambers, counters, ionization chambers, and more."

In the afternoon on Friday, Professor Zhao Zhongyao's deep and magnetic voice echoed in the classroom. The content of this elective course in nuclear physics is very basic, mainly involving the concept and history of nuclear physics, not advanced.

The reason why I talk about these basic contents is mainly because Yu Hua is alone in the classroom.

Yes, only Yu Hua himself.

Yu Hua, sitting under the stage, held a pen in his right hand and kept recording relevant knowledge. He was honored to be the only one among the more than 1000 students in Tsinghua University who took nuclear physics as an elective course.

In the nuclear physics course of Tsinghua University, except for a few students of this major, there are absolutely zero students in general elective courses.

No way, because people in this era have not truly realized the power of nuclear weapons, nuclear physics, one of the emerging branches of physics, is far less popular and attractive than the three brothers in the same school. - Classical mechanics, electromagnetism and thermodynamics.

For students, electrostatics, electromagnetism, and thermodynamics are more real and easier than learning about nuclei and rays that don't seem to exist at all...

understand.

A considerable number of students do not know about the nuclear physics courses offered by Professor Zhao Zhongyao. Very few students in nuclear physics courses have lost their interest and love for nuclear physics because of the difficulty of learning nuclear physics and the uncertainty of their future, and transferred to other majors.

The conclusion is: those who are not gifted can't learn, those who are gifted are useless.

Really, for China in this era, nuclear physics belongs to the high and low type, and its status is almost the same as that of the four major Tiankeng in later generations, and it is not popular with students at all.

In a word, is learning nuclear physics helpful for employment?
If you want to engage in research in this area, do you have the funds, equipment, skills and talent?
Without the input and support of national forces, the size of the school platform is simply not enough to support the research activities of this cutting-edge discipline.

This is not only the case in China, but also in most parts of the world. Only after the end of World War II, people all over the world will feel the terrifying power of nuclear weapons from beginning to end, and nuclear physics will usher in a true spring. The pursuit of students has entered a period of rapid development of prosperity and prosperity, until the peak.

Of course, for physicists from all over the world today, nuclear physics is the most cutting-edge research direction in physics today, the goal of developing and advancing forward, and a gold mine containing the highest honors and academic achievements.

The Curies and Becquerel discovered natural radioactivity and won the Nobel Prize in Physics.

Roentgen's discovery of unusual rays won him the Nobel Prize in Physics.

Bragg's study of crystal structure with X-rays won the Nobel Prize in Physics.

Bohr won the Nobel Prize in Physics for his research on the structure of atoms and the radiation emitted by atoms.

What is a physics gold mine?
Nuclear physics is!
Yu Hua listened quietly, and like a sponge, he continued to systematically learn about nuclear physics, supplementing his ignorant brain. The more he learned, the more ignorant he felt, and the deeper the experience.

Zhao Zhongyao, who was standing on the stage, was a little surprised when he saw Yu Hua's serious listening. He randomly asked a few simple questions, and Yu Hua gave all the accurate and correct answers.

This situation made Zhao Zhongyao a little interested, and the difficulty of the teaching content increased a little, and he began to intersperse mathematical formulas and physical formulas.

The reason why nuclear physics is difficult is inseparable from another reason, which requires students to have a solid mathematical foundation and perform a large number of complex calculations.

Most students who are interested in nuclear physics often give up when they encounter this difficulty.

Radioactivity and rays are the two major research directions of nuclear physics at present. The direction of development and application of nuclear technology is immature due to the limitation of the times.

In the two major directions of nuclear physics, a lot of academic achievements have been accumulated.

The first direction is at the node of research on radioactive decay. It proposes the theory of radioactive decay and the law of decay, and proves that one element can become another element through decay. Statistical.

Based on the theory of radioactive decay, physicists have found that in the process of decaying into another element, a radioactive element can often release a large amount of rays containing energy, which is the theoretical source of nuclear weapons.

Much progress has been made in the second direction. Alpha rays, beta rays, gamma rays, roentgen rays and neutron rays have been discovered, and their properties and basic characteristics have been measured.

In addition, nuclear physics was born in the 30s to discover the heavyweight achievement of antimatter. The first person to discover it was Zhao Zhongyao, but he was not the one who won the Nobel Prize in Physics.

On the podium, Zhao Zhongyao spoke more and more vigorously. The content of the course transitioned from basic knowledge to advanced level. The difficulty was beyond the outline, and it was not at all difficult for general education electives.

However, neither Yu Hua nor Zhao Zhongyao cared about this.

After a while, Zhao Zhongyao picked up the chalk, turned around and wrote a question on the blackboard: "For the rest of your life, try to solve this question. The get out of class is about to end. You can hand in the answer to this question within three days."

When the words were over, he put down the chalk and looked at Yu Hua with a smile.

Yu Hua looked at the blackboard and carefully examined the question. After two seconds, he stood up, and under Zhao Zhongyao's gaze, he came to the podium, picked up the chalk and began to solve the question.

The difficulty of this question is medium, and it belongs to the knowledge content that Zhao Zhongyao has talked about. It is characterized by the need for a lot of calculations.

Coincidentally, what Yu Hua is not afraid of the most is a lot of calculations.

The thinking computer runs stably at a speed of [-] million operations per second. Yu Hua's face is calm, and he can't see any expressions. He exudes an air of absolute rationality. He quickly calculates the answer according to the formula conversion, and the right hand is responsible for holding the chalk and writing it out in detail. Calculation steps and parameters.

"Sir, it's untied. Let's see if it's right." After 3 minutes, Yu Hua put down the chalk and smiled at Zhao Zhongyao, who was beside him with an expression of surprise and hell.

Zhao Zhongyao heard Yu Hua's voice, but he didn't want to speak. He stared at the topic that the teacher Robert Millikan had once assigned with his eyes filled with inconceivable and doubtful eyes.

The incredible thing lies in Yu Hua's problem-solving speed. It took him three days and a lot of time to solve this nuclear physics problem, but what about Yu Hua?

My doubt is...why did Yu Hua take less than 5 minutes?

Zhao Zhongyao could swear to God that he never leaked the question in advance.

"How...how did you do it?" Zhao Zhongyao asked Yu Hua with a ghostly look on his face.

Yu Hua bowed and said with a smile: "Sir, you forgot, I am a top student in the mathematics department. This problem is not very difficult, but it is very troublesome to calculate, and the amount of calculation is also very large, but students can solve it just by mental arithmetic. "

Can you do it just by mental arithmetic?
The corners of Zhao Zhongyao's mouth twitched slightly, and he suddenly wanted to hit someone: "..."

(End of this chapter)