Chapter 305 Inheritance

But before Wu Bin could answer, Academician Chen Xianhui said directly: "This means that what you get is just a picture drawn by computer software, and the specific relationship between it and physics needs to be carefully considered."

"Never regard the output of the instrument as physics. If you do experimental physics like this, you will be in trouble in the future."

After listening, Wu Bin said thoughtfully: "Professor, do you mean to use physical thinking to think about things?"

"Yes, that's what it means. The original purpose of experiments and machines is to facilitate us to better understand the world, but now more and more people are overly dependent on the data tested by machines."

"Take temperature as an example. Temperature is measured by a thermometer, and the measurement principle of all thermometers is to measure an other physical quantity and then convert it into A value, that value is called temperature.”

"But when doing experiments, quite a few people only look at the value in the "temperature" column given by their own instruments without understanding what temperature is, and end up suffering a big loss. Many temperature-related experiments This is how bad physics results are produced.”

"A ridiculous thing once happened in our Institute of Physics. You should know that crystal growth is a very important direction. It can be said that the most important thing in studying condensed matter physics is to obtain substances with certain physical properties. , this substance may no longer be a naturally occurring substance but require our own efforts to obtain it.”

Wu Bin couldn't help but nodded after hearing this.

For a man who has studied materials science for a long time, he has dealt with crystals quite frequently.

Seeing Wu Bin nodding with deep feeling, Chen Jinhui said with a smile: "It seems that you should understand that crystal growth is a very difficult and very comprehensive subject, and one of the key factors is temperature control. Where do we get the temperature?" , why the data measured by that instrument is called temperature, and what false signals this instrument may cause will all have an impact on our research."

"Once upon a time, one of our crystal growth instruments seemed to have some kind of malfunction. The bismuth crystals in it were not growing well. However, after the experimenter checked, they found that all the conditions were well controlled, and finally the failure occurred. It took everyone in a laboratory half a year to find out the reason, guess what it is?"

"this……"

Since Academician Chen Xianhui emphasized the words "laughing and laughing" before, it should not be a problem with the normal machine, so Wu Bin thought about it and guessed: "Is it because of a wrong operation in the temperature field control?"

"It's very close." Academician Chen Xianhui nodded. "In the end, they found out that it was because a wild cat in the yard pulled the thermocouple measuring the temperature and moved it."

"Is this okay?" Wu Bin couldn't help but be stunned after hearing this.

"Yes, the person involved also felt very broken. They never dreamed that it would be the reason. But through this incident, it proves what I said before. When working in the laboratory, do not think that the instruments are all A black box, if it says it’s an atomic image, you think it’s an atomic image, if it says it’s temperature, you think it’s temperature, that’s not the understanding a physicist should have.”

"The correct attitude when doing experiments is that you must strive to make the instrument you use transparent to you. A set of instruments is in front of you, from its physical principles to its electronic structure to the entire process of its work. The physical process and its theoretical explanation should be transparent to you, and that is called an experiment."

'Transparent...data...'

When Wu Bin heard these two words, a white light seemed to flash in his mind, and a stronger sense of connection than when he saw the full moon suddenly appeared in his mind.

"So, the instruments are just auxiliary, and people..."

Halfway through, Academician Chen Xianhui realized Wu Bin's thoughtful expression.

‘This little guy’s way of entering trance is quite similar to mine. ’

After a while, Wu Bin came back to his senses and looked at Academician Chen Xianhui who was smiling in front of him, and said quickly: "I'm sorry, professor, your words just now inspired me a lot, and I was fascinated."

"Oh? Have you figured out anything?" Academician Chen Xianhui asked happily.

"Yes, in fact, I have thought about using the strong adhesion and large contact area between alumina and two-dimensional iron germanium tellurium to prepare graphene single-layer samples, but I have been encountering problems in terms of adjustable gate voltage and temperature. When I hit the bottleneck, I actually had some inspiration to solve this problem in the past two days, and what you taught me today has benefited me a lot. Thank you very much for your teaching."

Academician Chen Xianhui laughed loudly after hearing this, "If every time I talk can make a student burst out with inspiration, I will be happy to death, but you can benefit from these words so quickly, which makes me feel very proud. So happy."

"Do you really want to do some practice in the laboratory now?"

After hearing this, Wu Bin quickly shook his head: "No, I want to talk to you more. I think I can definitely learn many things from you that books and documents cannot teach me."

"I like to hear this." Academician Chen Xianhui sipped the hot tea happily, "But in fact, what I can teach you is just my experience summarized from countless documents. I believe how much knowledge is passed down in the documents. You know it very well."

"In 1824, Carnot established the first French article on thermodynamics. You will find that Carnot's principle is the most basic sentence, 'Any heat conduction that is not for the purpose of doing work is waste.' This sentence is the most fundamental of thermodynamics. principle.

"Ten years after this principle was born, Clapperon understood it in 1834 and drew the cycle of Carnot's ideal heat engine. At the end of this article, he casually said, 'If for In any heat engine, heat conduction without the purpose of doing work is a waste, then the biggest waste of the kettle that is boiling water on the stove is not inside the kettle, but at the junction of the stove and the kettle.'

"It took about 50 years for such a sentence to be finally understood by an engineer Diesel. If the biggest waste is at the interface between the stove and the stove, then a good heat engine should not put the stove on the stove. Instead, the stove should be built into the stove.”

"Then we have the internal combustion engine in our world."

"These people are real gold diggers. What they find are the most important things to learn in physics. This is the inheritance of knowledge. I also hope that you can become the next person to dig out gold, or be the one who transfers knowledge to People who pass on the legacy.”

"The students have been taught." Wu Bin nodded with great respect.

PS: February is so short, not suitable for me who only explodes at the end of the month (sigh)