Li Yu was about to go back to his house when he passed by a larger room that was not closed and contained a dance studio.
Yu Rongling was practicing ballet inside. Rongling was only less than fourteen years old. Although she was still a little girl, her dancing talent was already clearly revealed.
Li Yu took one look and left, but was discovered by Yu Deling who was watching from the side, "Are you Li Yu...eldest brother?"
Li Yu stopped and said, "That's right."
When Yu Rongling heard the sound, she turned around and ran over quickly. When she came up, she said directly: "Do you know? You are my friend now."
Li Yu looked confused: "Friend?"
Yu Rongling said: "So is the star."
Li Yu suddenly realized: "You are Yu Rongling who wrote the letter."
Yu Rongling straightened up and said, "That's me!"
The Yu family sisters have lived abroad for many years and are not old-fashioned. Although they are Han Chinese girls, they do not have feet bound, otherwise Yu Rongling would not be able to practice dancing.
"Then we are really friends." Li Yu said with a smile.
Although due to the time travel, Li Yu's age is a little younger than the 25 years old before the time travel, almost 20 years old, but there is still a 6-year age difference between the two, and he looks like a younger sister.
"I can go and have a look at my star friend. It's so cold and must be very lonely." Yu Rongling is actually a very emotional little girl.
Li Yu said with a smile: "If you can see it, it is no longer alone. Why are you still practicing dancing so late?"
Sister De Ling said: "Sister Rongling will participate in a performance at the Opera House tomorrow. Didn't father mention it to you just now? We will go to the Opera House together tomorrow evening to watch an opera and dance performance."
Well, Yu Geng really knows how to arrange it.
Li Yu thought for a while and said: "If I can finish my lecture at the University of Paris early tomorrow, I will definitely go and watch it."
Yu Rongling immediately said: "There is still time, we will also go to your speech, and you will watch our performance, it will be even!"
It seems to be a schedule of the special mission. The special mission's stay in France should not be long. It would be good to see more.
"Okay, it's settled."
Yu Rongling raised his palms: "High five!"
Li Yu patted her gently with her slender hands.
But Yu Deling smiled and said: "You little girl, stop pretending. Will you understand if you go there? There are all great scholars in the university!"
"When I entered university, I also wanted to learn from others! Besides, you are three years older than me, so don't call me little girl!"
De Ling covered her mouth and smiled: "Why are you still angry?"
Yu Rongling ran into the dance studio, "I still have to practice dancing and I don't want to talk to you!"
De Ling smiled and said to Li Yu: "Sir, don't be surprised, she is just a little girl."
Li Yu also found it interesting. No wonder so many fathers like their daughters. They are indeed loved by others. Otherwise, Yu Geng would not have to carry his two precious daughters with him wherever he goes.
Li Yu said: "It doesn't matter. Are you really going to the University of Paris tomorrow?"
Yu Deling said seriously: "Of course I want to go. Not only my sister and I, but also my father and brother will go. It is rare to hear a person from my own country giving a speech at a university in France. I never dared to think about it before, so even if I can't listen,
Understood, we also want to support ourselves."
Li Yu was actually a little touched after hearing this. It was like meeting an old friend in a foreign land! Most of the overseas students sent out by the late Qing Dynasty went to the United States and Japan, and almost none came to Europe.
Yudeling asked again: "When you give a speech at the University of Paris, are you going to speak in French?"
Li Yu said awkwardly: "I don't speak French, I can only use English."
Yu Deling said "Oh": "Then I understand."
But I thought in my heart: Haha, it turns out that there are people who don’t know how to ask questions in universities!
Maybe Li Yu will learn French when he has time in the future, but for now, complicated grammar is a big trouble for him and requires too much time.
Early the next morning, a car parked in front of the legation, driven by Jean Perrin from last night.
Peilan took off his hat and said to Li Yu who was waiting at the door: "I don't know if you have seen it in the UK. This is also the latest model of car."
Li Yu smiled and said: "I have seen it and even drove the Daimler car owned by Huggins, the president of the Royal Society."
Perrin introduced: "This car is made by Renault, but it does not belong to me. It belongs to the principal. He specially asked me to use it to pick you up."
Nowadays, cars are so expensive, and the courtesy given to Li Yu by the University of Paris is considered very high, which is equivalent to giving a Rolls-Royce to later generations.
Although horse-drawn carriages are also a very prestigious mode of travel nowadays, new things like cars are obviously more in line with the style of a university that values innovation.
After the vehicle started, Peilan couldn't help but tell Li Yu about the car: "Although Renault was just established four years ago, their products are incredible! I heard that they have also developed a technology called turbocharging.
Patented, I really want to experience it!”
Oh my goodness, turbocharging! It turns out it was born so early!
You know, in the 21st century when Li Yu lived, there were still many people who believed that turbocharging was an unstable technology. Especially in the United States, many people were still extremely obsessed with large-displacement self-priming.
The promotion of new technologies always requires considerable costs and resistance. However, the automobile industry is still in its infancy at this time, and various technologies are growing through continuous trial and error.
Peilan's driving skills are much better than Li Yu, and he definitely drives a lot. Peilan continued: "It's a pity that it's too expensive. Can you believe this car costs 3,000 francs!? Hey, I really want to have a car to participate in racing competitions.
ah!"
It seems that men 100 years ago could not resist the charm of cars and loved them to death. Moreover, these great scientists who were once mentioned in textbooks were also so down-to-earth in life.
3,000 francs is a large amount, almost the total salary of an ordinary worker for 10 years.
The racing competitions he mentioned now exist, and Renault has made its name through car racing.
Racing is definitely a tradition of Renault. Until the 21st century, Renault also has the highest level F1 racing team. It is quite difficult, after all, F1 only has ten to twelve participating teams every year.
At the beginning of the 20th century, cities were not very big, and we could reach the University of Paris in no time by car.
Peilan took Li Yu into an auditorium. Principal Greal stood at the door to greet them. Peilan introduced them. After greeting them, the principal said: "It is an honor to invite an outstanding young scientist to come to our school to do research.
speech."
Li Yudao: "When I come to your school, of course I want to learn from each other!"
"Please come in! Many students and lecturers are already waiting inside."
Several people walked into the auditorium. Li Yu took a look and said, "Hey guys, there are at least 300 people in the audience. Didn't we agree to just have a small seminar? This is too grand!"
When Li Yu saw the banner, he realized that today was also the anniversary day of the Faculty of Science of the University of Paris. No wonder there were so many people.
The principal first came to the stage to deliver a speech and spoke for a while about diligent study.
During this period, Li Yu actually saw the Yu family rushing to the auditorium, and their family was sitting in the middle right position. Huang Kaijia, who was part of the special envoy, also arrived.
Fifteen minutes later, Principal Grayard finished his speech. Li Yu originally thought it would be longer, but he didn't expect it to end so quickly.
The principal finally said: "Today we invited a young scholar to give a lecture in the auditorium. He is the young scientist who just predicted that X-rays are electromagnetic waves, expanded the second law of thermodynamics, and discovered Pluto, Li Yu!"
What he said was so provocative that the audience immediately applauded wildly.
At that time, the University of Paris was the center for Chinese studies in Europe, and it was relatively familiar with Chinese humanities and culture.
Peilan pushed from behind, and Li Yu stepped onto the podium.
Although I had given speeches during my studies, this was the first time for me to give such a formal speech.
Li Yu looked at the audience and suddenly caught sight of a familiar figure, with an elegant sitting posture and pure eyes, like an unyielding rose among the men. Surprisingly, it was Marie Curie!
Next to him was Pierre Curie. The Curies were actually present together!
Oh my God! There really is a boss!
Now that Pierre Curie is a professor at the Faculty of Science at the University of Paris, it makes sense for him to attend this occasion.
But Li Yu felt even more nervous.
If we say who the greatest female physicist is, there is no doubt that it is Marie Curie. She has won the Nobel Prize twice and is absolutely well-deserved.
Although Marie Curie will not officially receive the Nobel Prize until next year, she and Pierre Curie have already discovered the new elements polonium and radium, and successfully extracted radium salts. The Nobel Prize is already a certainty.
Moreover, Marie Curie is really a scientific model for all mankind. She has no stains in her life. Her career and personality are top-notch, and she is absolutely dazzling. The key is that she can also train her daughter to become a Nobel Prize winner, and she is also a husband and wife.
It’s really incredible to win the award together!
Li Yu's palms felt sweaty. It was because the Curies' aura was too strong.
Li Yu was lost in his thoughts and did not speak for five or six seconds. The principal next to him reminded him: "Mr. Li Yu, you can just say whatever you want."
Originally, he did want to talk casually, but what kind of people are there in the audience! How could he just talk casually?
Li Yu sorted out his thoughts and said: "I am very honored to be standing here. This happened suddenly and I didn't make any preparations. I should just chat with everyone.
“I think everyone must have heard Michelson, a senior figure in the academic world, say that the building of physics has been built, and future generations are just doing a little tinkering work.
“But there are many outstanding scientific researchers sitting here today, and I think just from their research fields we can see that there is still a long way to go in the future.
"The great discovery of radioactivity by two professors, Mr. Curie and Madame Curie, is one of them. As for the application of radioactivity, we still know too little.
"Many people also say that I have made some predictions. The reason why they are called predictions is because they still need to be discovered. The nature of X-rays and the nature of the principle of entropy increase still need to be verified by experiments.
"I also know that many people will definitely question my point of view, because I don't even have a way to prove myself. I also admit that I am not good at experiments. But when it comes to confirmation, here today, I have something to talk about. , that is what is the essence of science! This question may be a bit unfamiliar, I wonder if you have thought about it?”
Li Yu looked at the audience. In fact, what he was talking about was a philosophical issue about science. However, people at that time obviously did not think deeply about the essence of the word "science" itself.
Even Madame Curie raised her chin and started thinking when she heard this question.
Someone in the audience replied: "You just said that science is about exploring the nature of the world."
Li Yu said: "What you said is not wrong, but what I want to ask now is the nature of "science" itself, rather than using science to study the nature of the world."
"The nature of science?"
Many students in the audience began to whisper among themselves.
In this era, the philosophy of science is simply a research direction that has not yet been born, and what Li Yu is talking about is a theory that will only appear decades later.
Li Yu paused for a while and said: "Whether you or I are facing doubts, I hope everyone understands what I am going to say today. That is, science must be falsifiable!"
As soon as these words came out, the audience was instantly confused.
"Falsifiable? Have you ever heard of this term?"
"Are we in a philosophy class?"
"Totally incomprehensible!"
Only Madame Curie's eyes flashed. She had extremely high academic skills and had been engaged in cutting-edge scientific research for many years. She seemed to have figured out some tricks. She raised her hand and asked: "Can you give me an example to explain?"
The first person to ask a question was surprisingly Madame Curie.
Li Yu continued: "The so-called falsifiable means that it can be proven to be wrong. It must be noted that it is 'can be proven to be wrong'. These words are very important. For example, some people once said that earthquakes were Because the earth is flat, there are four elephants standing at the four corners. One of the elephants felt tired, raised one foot and shook it, and the earth shook. Do you think this is science?"
Many students laughed directly: "It's just nonsense!"
Li Yu also laughed: "Yes, that's right, this is nonsense! But it is a scientific theory, but it is just a wrong theory."
Another explosion broke out below: "Science, this is science? What a joke!"
Li Yu raised his hand to signal everyone to be quiet and let him continue: "The reason is very simple, because this theory can be falsified. Hundreds of years ago, Magellan circled the earth and discovered that the earth is not flat, but a ball, which directly proved the theory It is wrong. And this is falsifiable, which means it can be proven to be wrong."
The audience fell silent, and everyone was listening to Li Yu continue to speak. What he said was so novel, and the principal Greal next to him became more and more novel as he listened.
Li Yu continued: "Let me ask you, if I say again that earthquakes are caused by God sneezing, do you think this is science?"
The students then said: "What you asked is too simple. Of course it is not science. It is also nonsense!"
Li Yu gave a thumbs up, "Excellent! You are right! But they are all nonsense. Why is the elephant's statement just now scientific, but God's statement is not science? It is because science can be falsified, and science is There are right and wrong things. We can prove which ones are wrong and then use the correct ones. But do you think there is a way to prove that God is wrong? No! So this is not science!
"Or if you go to pray to God and wish you to pass the exam, but then you fail, others can say that your heart is not sincere and you have not moved the gods, but how can you be sincere? The right to explain is completely false. Likewise, this
It's also pseudoscience.
"So I said, if it is just a theory that can be proven to be correct or not, even a beggar on the street can tell you a lot, but it is not science!
"Only a theory that must have some method to prove whether it is wrong is a scientific theory!"
Li Yu's explanation is very easy to understand, but the truth is extremely profound.
This is the famous Popper's scientific philosophy thought in later generations. Speaking of it in this era that is about to completely get rid of ignorance is nothing less than a bolt from the blue and thunder on the ground!
Madame Curie took the lead in stretching out her hands and applauded, and then the whole auditorium burst into long-lasting applause.