"In any case, when the wedding venue is decided, I will inform Professor Einstein as soon as possible, and you are welcome to come to my wedding."

Chen Muwu didn't know that Einstein was a little depressed now, he just felt that Einstein had already gone to Paris to attend the wedding of Irena and Frederick last year because of Marie Curie's face.

Then if he marries Eve, there is no reason for Einstein not to come, because this time, whether there is Marie Curie, who has a good relationship with Einstein, and the relationship with him has been "eased" again.

"It's easy to say, it's easy to say, when you get married and have a wedding, I will definitely go to it."

The question of witnesses is much simpler than quantum mechanics.

The main reason is that it is true that as Chen Muwu said, of course, he has made a lot of achievements for the Cavendish laboratory, and he has been wandering alone in Cambridge University for several years, and Rutherford has also taken good care of this stranger from China.

Chen Muwu can't be blamed, nor Rutherford can be blamed, but Planck can't be blamed for not listening to his old love and failing to resolutely win Chen Muwu to Germany.

Einstein quickly thought about it, it doesn't matter whether the witnesses are successful or not, the main thing is that they must go to Chen Muwu's wedding.

The Chinese say that if the sheep is lost, the hole in the sheepfold will still be effective, and this is the reason.

The old, middle-aged and young physicists who participated in the meeting walked out of the Solvay Palace one after another, or sat or stood at the location where the group photo was taken.

Under the command of the photographer, everyone quickly set up their shooting poses, and the former also pressed the shutter and used the light to record the people in front of him on the photographic negative.

From this moment on, they became a part of history.

After the group photo, some of the physicists who had already bought their tickets for the return trip had already been purchased, and the physicists who wanted to leave early said goodbye to this year's Solvay conference one after another.

Those who have more time left can also attend a farewell dinner at Solvay Palace this evening before departing at the time printed on the ticket.

Chen Muwu and his entourage belonged to the latter, and unknowingly, he went to Stockholm this time, followed by a group of people, not only Zhao Zhongyao and Cockcroft from the Cavendish Laboratory of Cambridge University, but also Irena and Frederick from the Institute of Radium at the University of Paris.

Before the opening of the Solvay Conference, in Marie Curie's room, in front of his future mother-in-law and future mother-in-law's sister, he made plans to build a cyclotron in Sweden, especially mentioning the invitation of Irena and Frederick to participate in the construction.

After this matter was said, Irena immediately showed great interest, and after considering various factors, Marie Curie finally nodded and agreed to Chen Muwu's invitation, as well as the request of the eldest daughter Irena.

She wanted her daughter and son-in-law to follow Chen Muwu for a long time, and secondly, she wanted them to learn the experience of building cyclotrons, and when they returned to France, they would see if they could build one in the Radium Research Institute.

They have missed an electrostatic particle accelerator and must not miss this more advanced cyclotron.

As for the fact that there were three people when they came, and when they returned to France, Marie Curie was left alone, there was no need to worry at all.

Although the level of physics research in France in recent years is not as good as that of Einstein's Germany and Chen Muwu's Britain, it is also the second and third largest country in the European continent after all, and many physicists have also been sent to participate in the Solvay Conference this time.

Marie Curie was one of the most respected members of the French delegation, and she had no problem returning to France safely and securely, surrounded by everyone.

After meeting again, Frederick was very excited, he knew that Chen Muwu was full of opportunities, as long as he grabbed one casually, he would be countless glory and wealth in the future.

"Dr. Chen, thank you very much for inviting Irena to join me in your next work."

Chen Muwu responded with a smile: "Frederick, don't be so polite. For example, I would never call my family 'you', nor would I call him with his position, such as 'Professor Frederick'.

"Of course, I also want to state one thing in advance, I invite my sister and brother-in-law to come, not because the two of you are my family, but because of the outstanding scientific research ability of the two of you."

Although Chen Muwu said so, Frederick still thought that he was being polite, and he became more and more grateful to Chen Muwu in his heart.

After attending a farewell dinner at Solvay Palace that night, Chen Muwu slept soundly in his room.

- Dirac had already left Brussels that night with the large army of Cambridge University and returned to Cambridge University in England.

The train ticket for their group to go north to Stockholm was scheduled for the afternoon of the next day.

Belgium and Sweden are not neighbors, so they have to travel from Brussels to Stockholm first, and in those days they naturally could not take a plane, so they had to choose other options - by ship and train, or by train and ship.

The former has to travel from Brussels to the neighboring Belgian port city of Antwerp, and then get on board from there, still crossing the North Sea, and then arriving at Gothenburg, a port city on the west coast of Sweden by the North Sea, and then changing to a train from Gothenburg to cross the whole of Sweden from west to east to reach the capital Stockholm.

This path, when the staff of the Solvay Foundation, who was responsible for buying return tickets for the physicists who came to the conference, first proposed it, it was immediately rejected by Chen Muwu.

As soon as he mentioned Beihai, Chen Muwu remembered the experience when he almost died in the stormy North Sea because of a boat.

As soon as he mentioned taking a boat in the North Sea, Chen Muwu couldn't wait to spit on the floor of Solvay Palace on the spot.

So they had to choose another way, which was to take the train to the northern ports of Germany, and then cross the sea to the land of Northern Europe in a narrower strait.

So this group of five people came back to Germany with a delegation of German physicists who came to the Solvay conference.

Chen Muwu, Zhao Zhongyao, and Cowcroft, the three members of the Cavendish laboratory, went to Stockholm for an exchange visit and attended the Nobel Prize ceremony a month later.

And Irena and Frederick, the young couple, repeated the old trick, claiming that they were going to the Nordic continent for a honeymoon trip, and by the way, they went there to see if they could get lucky enough to encounter the aurora in winter.

Everyone tacitly did not announce the true purpose of their trip north to anyone other than the five.

After the train left Berlin, only Chen Muwu and the five of them were left in the seats.

Chen Muwu finally didn't have to hide it anymore, but took out a paper and pen, and took advantage of the last period of time before the end of the journey to begin to explain to the remaining four people what the principle of cyclotron is.

Truth be told, the principle of this accelerator is even simpler than that of the electrostatic particle accelerator in the Cavendish lab, which is to use an electric field to continuously accelerate charged particles piece by piece.

And because of the addition of a magnetic field, it can confine the charged particles within a certain range, so it also greatly saves space and the amount of electric fields generated, making the linear accelerator that the Swedish scientist Isin developed three years ago feasible.

Before the train running on the tracks at a speed of tens of kilometers per hour left Berlin and reached its final destination, Chen Muwu had already explained the principle of this cyclotron particle accelerator to the other four people present.

I am grateful to Frederick Chen Muwu for bringing him and Irena to participate in scientific research activities, but when this journey first began, he was still a little embarrassed.

Because except for him and his wife, the remaining three people have either won the Nobel Prize in Physics or are about to win the Nobel Prize in Physics, and only the two of them are academically white.

However, after participating in Chen Muwu's scientific research on the train and listening to Dr. Chen's in-depth explanation, Frederick suddenly became very confident.

As long as I follow my future brother-in-law to do academic research in physics, I don't have to worry that they will not be able to achieve great results in academic research like Dr. Zhao and Dr. Cockcroft in the future.

The train finally arrived at the port, and the group of five people bought tickets for the ferry to cross the sea as soon as they got off the train.

From northern Germany to southern Sweden across the sea, the ferry journey at sea takes less than two hours.

After getting off the ship and returning to land, they got closer and closer to the destination of their trip.

Three years ago, when Chen Muwu came to Sweden with his family and friends to receive the award, he was surrounded by local reporters in Malmö, the port city across the sea from Copenhagen, the capital of Denmark, asking questions about his Nobel Prize.

Fortunately, Bohr had already reminded him in advance at that time, so that Chen Muwu did not make a fool of himself because he could not answer their questions in front of reporters without preparation.

But they came to Sweden more than a month ahead of schedule, before the Nobel Prize season.

And they were very low-key, so in this port, where southern Sweden commutes to Germany, only a small number of people saw a combination of four men and one woman, three Caucasians and two yellow people, and felt strange about it.

Before getting back on the train, Chen Muwu hung up a phone call at the train station to Markus Jr., a close friend of the Wallenberg family, and told him the train number he was going to take this time.

He also specially instructed Marcus Jr. on the phone that they came in a low-key manner this time, and the side that picked up the station must also be low-key and not make any big scenes.

That's why Mr. Chen called his business partner instead of his best friend in Sweden, the Crown Prince of Sweden.

Because if he told the latter about his coming to Sweden, even if he repeatedly told him to keep a low profile and not engage in those bells and whistles and flashy welcome ceremonies, he felt that His Royal Highness Wang Chu would definitely make this matter known all over the city.

It's better to wait until you arrive in Stockholm and meet up with this good friend.

The invention and popularization of the telephone have improved people's lives to a certain extent.

If it was in the telegraph era, then Chen Muwu had to send the telegram out at the port in Germany at the latest in order to let the other party know that he was about to arrive in Sweden, and he had to leave enough time for the telegraph office staff to translate and deliver the telegram.

But now he only needs to make a phone call in the telephone room of the train station to explain everything to the other party in a timely manner, and he no longer has to pick words on the number of words in the telegram to save a few finney coins.

On the train in Germany, Chen Muwu has roughly explained the principle of cyclotron.

So in the Swedish train, Zhao Zhongyao and Cockcroft began to brainstorm the drawings of how to design the cyclotron, just as they had done with the drawings of the electrostatic particle accelerator that Chen Muwu had made for less than a pound.

Irena and Frederick were a little reluctant to let go at first, but they gradually became infected by the academic atmosphere on the train and slowly plunged into this collision of ideas.

Chen Muwu sat in his seat and closed his eyes to recuperate, thinking about how to arrange the more than a month after arriving in Stockholm today.

Occasionally, he would open his eyes and follow the train of thought of the other four to discuss a few words.

"Let me remind you a little that when particles are accelerated to close to the speed of light, relativistic effects must be taken into account. At this time, the switching frequency of the accelerated electric field will be different from the previous one, so there are two options, one is to directly let the particles shoot out, and the other is to change the frequency, so that the frequency of the accelerated electric field and the accelerated particles become synchronized.

"But I think the second method is cumbersome and unnecessary to build for our cyclotron prototype, we just need to follow the first method, build a machine that doesn't need to think about relativistic effects."

The cost of cyclotrons is already so high, so why bother to start the synchrotron project in one step?

Irena felt comfortable sitting with her brother-in-law and the two young men he had brought with him to discuss the text.

Frederick's idea went one step further, and he suddenly realized that problems in physics should be discussed with more energetic peers, because the brain is more flexible, so it is more able to collide with sparks when thinking about problems.

The train traveled to Stockholm, and outside the station, Marcus Jr. sent a car to meet the guests from the south.

The five of them got into three cars, and Marcus Jr. and Chen Muwu squeezed together.

As soon as he got in the car, he reported good news to Chen Muwu.

(End of chapter)