Zhou Chen didn't react for a while when he looked at the few words on the paper at first glance, because the five words "simultaneous transitivity" had too many meanings. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Literally, there is "at the same time" and "transmission", but what exactly is being conveyed is not further explained.

Is such a vague question really his introductory exam?

"Professor Yang, is this the question that Professor Zhao gave me?" Zhou Chen asked with some surprise.

"Yes, these five words are the question given to you by Professor Zhao Fengxue, you must first clarify the meaning of this question, and then answer according to this question."

Speaking of this, Yang Hexin stopped, and he said helplessly: "That's all I can tell you, in order to avoid too much information misleading your thinking direction, I won't tell you too much." ”

"Okay." Zhou Chen nodded in understanding, knowing that he couldn't get more useful information from Yang Hexin.

His brow furrowed, and he looked at the words "simultaneous transitivity" on the paper, trying to decipher the meaning of the question.

Do you know that an academic giant like Professor Zhao Fengxue would come up with some pediatric questions for others to answer? Judging from the title he used these five words, there should be a certain deep meaning behind these words.

Zhou Chen tried to understand "simultaneous transitivity" from a positive perspective, and he thought of the field that Professor Zhao Fengxue is good at—gravity and general relativity!

In the theory of relativity, there is the principle of "simultaneous transitivity", which can be said to be an important thought experiment that laid the cornerstone of general relativity.

Could it be that Zhao always asked him to write an article about "simultaneous transitivity" in the theory of relativity?

It's possible, but it's not entirely certain.

It is not excluded that Professor Zhao Fengxue deliberately asked this question, and his real purpose was not to ask him to answer what "simultaneous transitivity" is, but simply to examine the way of thinking of the respondent.

Many times people's thinking tends to be linear, because there are too many things in life, there are often reflexive answers when encountering some problems.

This phenomenon becomes more and more prominent as the experience becomes richer, and some questions that children can answer will suddenly become unanswered when they reach the hands of adults, as if they have suddenly been dragged down by "common sense".

The more people grow up, the more complex their thinking becomes, and after losing their simplicity, a lot of creative thinking is gradually lost.

So there is a law in the physics world, but all scientists with outstanding achievements, those achievements are often the results of their youth.

Zhou Chen couldn't help but wonder if Professor Zhao would also test himself with such a purpose?

If Zhao Fengxue just wanted to test whether his way of thinking had been solidified by common sense, then if he still re-explained it in accordance with the "simultaneous transitivity" that his predecessors had studied, wouldn't it be inferior and make Professor Zhao Fengxue look down on himself?

But who says the same thing can't be said to be new?

Zhou Chen thought about it, and a smile slowly appeared on the corner of his mouth.

He had already decided in his mind whether to explain it in terms of the description of "simultaneous transitivity" in the theory of relativity! As long as he writes the article well enough, he is filling the old bottle with new wine, and using his strength to prove that he is by no means solidified by common sense.

Since there is a high wall in front of me, I will break it with my strength.

In this vigorous way, prove your ability!

After setting the direction, Zhou Chen's eyes widened a lot.

Yang Hexin also knew Zhou Chen very well, and when he saw that his spirit was relaxed, he knew that his disciple already had a direction, so he couldn't help but smile on his face.

He stepped forward and patted Zhou Chen on the shoulder, and said some words of encouragement to him, of course, he kept his agreement with Zhao Fengxue from beginning to end, and did not give Zhou Chen any form of hints and help.

Yang Hexin only stayed in Taizhou for one night, and after handing over the topic of Professor Zhao Fengxue to Zhou Chen, he took the high-speed train to Nanjing that afternoon.

Zhou Chen personally sent the tutor to the station, and after listening to Yang Hexin's advice at the station, he went home, and then began to conceive the content of the article around the center of "simultaneous transitivity".

He really needs to rationalize his ideas for this article, not only because this is the topic given to him by Professor Zhao Fengxue, but also because it is a very typical abstract theoretical concept in physics.

It is like a stepping stone, telling researchers very clearly the difference between the appearance and the inside of things.

The so-called "simultaneous transitivity" is actually a concept proposed by Einstein, and we all know a truth, if object A and object B have the same temperature, and object B has the same temperature as object A, then it can be concluded that the temperature of object A and object B are also the same.

It's not nonsense, but we know that the reason why we think it's nonsense is because we've accepted this common sense.

How object A conducts through object B to object C, and finally arrives that object A has the same temperature as object C, is the transitivity of a certain aspect of property.

In this example, it is shown that there is "temperature transferability" between objects.

Then "simultaneous transitivity", as the name suggests, can of course also be understood as time has the property of transitivity.

In other words, if a clock is placed in each of the three places A, B, and C, if the time of clock A is synchronized with clock B, and the clock B and bell C are synchronized at the same time, then it can be concluded that clock A and clock C should also be synchronized at the same time.

However, in fact, can the clocks of the three places really convey the concept of "simultaneous"?

The magic of physics lies in the fact that the conclusions that come to a conclusion that seems to be routine are often jaw-dropping.

Yes, the clocks in these three places are not necessarily "simultaneous".

Einstein proposed that in any inertial system coordinates, we can use optical signals to correct the clocks at rest in three places "simultaneously", so we can smoothly get the result that the three clocks A, B, and C are indeed synchronized at the same time, which shows that the concept of "simultaneous" is indeed transitive, and can be defined by a unified "time" anywhere in the entire space-time, which is consistent with our common sense.

But in the curved space-time of general relativity, you can pair A and B clocks, and B and C clocks, but the A and C clocks often don't match, which shows that the concept of "simultaneous" is not transitive.

Therefore, the concept of "simultaneity" in the theory of relativity is not valid in any frame of reference.

It's amazing that time is sometimes synchronized at the same time, and sometimes it can't.

For example, in a high-speed train, a string of firecrackers a and firecracker b are placed at the front and rear of the car, if the person "Little T" on the car thinks that the two firecrackers are ignited and exploded at the same time, then in the eyes of the person "Little Y" under the car, as long as the car is moving, then the two strings of firecrackers A and B cannot be ignited and exploded at the same time.

Here, firecracker a, firecracker b, and "little T" are in the same inertial frame of reference, so their time is "simultaneous"; And "little Y" is in a frame of reference in relative motion, so when it is in the state of "simultaneity" with one of the firecrackers, it is necessarily not "at the same time" with the other.

Is it very different from people's daily perceptions and difficult to accept?

Why don't we usually feel this relativity? In fact, the key is whether the observer and the observed are under the same frame of reference, and the passage of time...... There is a direct correlation with the state of movement, but this difference is not easily noticeable at low speeds.

Once these questions are clarified, there is a general understanding of "simultaneousness".

However, it is not easy to write an essay about "simultaneous transitivity", and many times the idea comes to mind, but when you write it, it disappears and has nowhere to put it.

Zhou Chen thought about it for several days, and the thoughts in his heart became more and more full, but every time he was about to write, his thoughts were always interrupted.

He sighed secretly, but there was no way to do it, he knew that writing an essay needed a state, and it was not an overnight thing.

At this time, you need to stop and relax and stretch your depressed mood.

Zhou Chen would choose to chat with Yang Xi, as if every time he chatted with her, his mood would always be refreshed. It's like the long-drought licorice ushered in a baptism of spring rain.

Until the third day, when the sky was clear and the clouds were clear.

Sitting at the desk, Zhou Chen's eyes fell on the windowsill not far away. At this time, the doors and windows are closed, the air conditioner is blowing cold air into the room, and the white curtain on the windowsill flutters gently in the slight disturbance of the air.

Zhou Chen was motionless, his eyes were open, but he meditated quietly as if his fugue was too empty, time seemed to freeze at this moment, and suddenly a spring of thought surged, he picked up the pen and wrote on the scratch paper like a wild scribble.

The words that were connected into a single stroke jumped on the paper, and suddenly it was impossible to see what was written, but as the long paragraph of text ended, a row of "ghost drawings" that looked like formulas, but not like formulas, appeared in the blank......

This state lasted for more than ten minutes, and after writing three pages of A4 paper in a row, Zhou Chen put away his pen, held it in his hand and shook it, he shook his sore right hand a few times, looked at the dense cursive and nodded with satisfaction.

Immediately, he created a Word on his computer and began to write articles.

The title is "The Theory of Relativity "Simultaneous Transitivity" One of My Own Opinions", and then he quickly typed the words on the paper into the computer with his fingers flying.

After a few days of hard work, Zhou Chen was also very happy.

After checking that there was no problem, Zhou Chen printed it out.

Zhou Chen's article summarizes the experience of his predecessors, and it is still written lofty, and the popular language is full of resilience, and a belief that penetrates the back of the paper is conveyed through the paper.

Although the content may not go beyond the premise of his predecessors, in this article, he shows his extraordinary talent in the field of mathematics as always.

The Lorentz and inverse transformations were played by him in new tricks, and of course, they were also played more complicated by him.

This made Zhou Chen feel very helpless.

"Forget it, this question is still left to Professor Zhao Fengxing to worry about......" The article was finalized, Zhou Chen had already completed his task, and he didn't want to pay attention to the rest for the time being.