Vol 3 Chapter 552: :lecture

This may be Ye Hua's first lecture to a student in his life, but he is very skillful. In fact, it is similar to the product introduced at the press conference, with some differences.
Ye Hua didn't tell these students too much esoteric knowledge, which is what doctoral students should do, so as not to hit them too deeply. These knowledge points are really difficult, and they need to master more to eat them thoroughly. Knowledge.
"It doesn't matter if you don't understand. I will study systematically in the future. I should make an impression today." Ye Hua listed a formula on the holographic screen, staring at the image and said, "The Maxwell equations describing electromagnetic fields are the first in physics. In a field theory, he said that the wave of the electromagnetic field will generate electromagnetic waves, and he calculated the theoretical speed of the electromagnetic waves, and found that it was very close to the speed of light measured by people at that time, so he predicted that light is also an electromagnetic wave. Well, this is a great god. "
In the physics world at that time, it caused an uproar. It can be said that it was very sensation. Today everyone knows it, and everyone knows it.
"In other words, light is also the result of the vibration of the electromagnetic field. What does this mean?" Ye Hua looked back at a few students, all seriously listening to the teacher, none of them had a bad job, and Ye Hua was very satisfied with this. Someone will be very angry when they take a job, probably this is a "common problem" of teachers, and they will always pay attention to it.
"Students can imagine that they all exert their own brainstorms. What would happen if you held a charge up and down?" Seeing them thinking, Ye Hua gave them a while, then went on to say:
"When you shake the charge, it is equivalent to dragging a point on a calm water surface to vibrate up and down, which will cause ripples in the electromagnetic field."
"Just like Shuibo!" Li Yantao said.
"Yes!" Ye Hua nodded: "So what is the consequence? Of course, electromagnetic waves are generated. When the frequency of this electromagnetic wave falls within the range of visible light, visible light is generated."
Seeing them continue to look at themselves, Ye Hua knew that they fully understood, otherwise he would think suspiciously.
Ye Hua called up a picture of a light bulb and said, "For example, as soon as the lamp is energized, the current will heat the filament, and the atoms and electrons inside it will be disturbed as soon as it is heated. The electromagnetic field fluctuates, so an electromagnetic wave is generated, and the frequency of the electromagnetic wave falls in the visible light range, so visible light is generated, so you know why the light bulb is on. "
Having said that, Ye Hua once again called up a simulation picture of the cosmic rotation of the cosmic celestial double star system: "Similarly, we can make an extension, and we can understand gravitational waves. In theory, if you take any mass object, it will vibrate. The fluctuations of the gravitational field are just so weak that they are almost absent. However, the mass of the celestial body is large enough. The gravitational field fluctuations caused by the process of the double stars collapsing into black holes will cause the entire space-time to deform like waves. Observation of gravitational waves, of course, even with the help of professional instruments to detect equipment. "
Ye Hua walked away:
"Then inferior to the other, and then extended to the" static field theory ", the fluctuation of the static quantity field will be generated by the virtual transmission field generator, and then by regulating the boson transfer interaction, which is the so-called static quantum, what is it called? Not important, the static quantum according to the classification of particles should belong to a new type of boson. So students, even if you have n’t studied quantum mechanics in depth, you should have heard of wave-particle duality, which means that matter is both a particle and a wave. In fact, it is also a field. Particles are fields, and fields have spins. "
The young geniuses here are gradually aggressive, there is no pressure in front of them, but now they are gradually falling into autism.
Ye Hua watched a few of their expressions with slightly raised mouth corners, and soon turned his eyes on Li Yitao: "If you want to become a physicist, an excellent physicist, you will have to master this knowledge in the future, including" static field theory " . "
"So the hysteresis field theory is based on the framework of the Young-Mills gauge field + Higgs mechanism. Naturally, it cannot bypass quantum mechanics. From the name, we know that it is not only inaccessible but also critical. The introduction of QCD theory for quantum chromodynamics is described. As for QCD theory, it is simply a standard dynamics theory that describes the strong interaction between quarks, which will be studied systematically in the future. "
"In other words, it is the maintenance of the quark model. The static quantity field model will become an extremely important part of the standard model of particle physics in the future, so this is a required course."
The eight Guanhua class students present did not know what Ye Hua meant, but if a graduate student or the postgraduate party heard it, most of them would be in trouble, and they would definitely be full of Ye Hua's grievances. Especially students of particle physics.
In the 20th century, the mountains set by the big bulls were more difficult to turn over, and now another big mountain has come out?
When I wake up, I need to acquire an entirely new knowledge point, and it is still such a heavenly book level? What's more terrible is to have a lot of fairy-level knowledge points at the same level before mastering "static field theory". Quantum chromodynamics QCD theory is a canonical theory, and its canonical symmetry group is SU (3), so You still need to master the "knowledge of mathematics" to understand the description of the quark model, and the Yang-Mills theory ... and so on!
"Then the question is coming, teacher, what is the field?" Lorantis Rose looked upright, blinked and looked at Ye Hua, with a desire for knowledge.
Ye Hua coughed a few times, glanced at Lorantis, and said lightly:
"This question is not good in itself, but it is a good question. Because of this, people in the 19th century put forward the concept of ether. The main reason is to embody the field. Now we know that the proof comes out. Ether is a substance. No. The existence of a field is important, but what the field is. Now that we know that a field exists, it is completely correct to describe the field mathematically, and it is also correct to prove it by experiments, and the field is really good. So when you encounter a problem and need to introduce the concept of a field ~ EbookFREE.me ~, you just need to understand in your heart that there is a field here, and that's enough. "
Ye Hua did not teach them further. It is too early for them to learn these knowledge points. It is useless without any preparatory talks. Even talents are far beyond ordinary people, it also requires an acceptance process. .
Just leave an impression on them. Teaching, educating, preaching, and getting rid of confusion is not an easy task, especially for these young people, but also to guide them to grow up healthily.
To bring them in, they must be responsible not only for their studies, life, and growth, but also for their parents, such as Ning Jie, who is from the Hexi Corridor in the northwest and far from the hometown of Saibei.
And they are all in their teens. Compared with ordinary college students, they can't live independently.
However, having said that, Ye Hua did not treat them like greenhouse flowers in the ivory tower. Xiao Liu was the life instructor in charge of the first class of the Guanhua class. During this time, there was no school, and basically they organized some sports. Military training activities, outdoor activities, as well as the independence of life that mainly guides them.
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