Otaku Engineer in Great Tang Dynasty

"You mean you saw the stars move? How is this possible?"

　　 Yunshan Courtyard.

　　 Li Zexuan subconsciously frowned when Li Chunfeng said that he saw the movement of stars.

　　 The stars Li Chunfeng saw should be other stars outside the solar system. The reason why a star is called a star does not mean that the star does not move, but the movement of the star is definitely invisible to the eyes in a short time.

　　 There are no fixed celestial bodies in the universe, all celestial bodies are in motion, but the speed is different. Stars not only move, but also move at a high speed at the speed of the universe. Take the sun, for example, it is rotating around the center of the Milky Way at a speed of approximately 250 kilometers per second.

　　 The speed of other stars is also amazing. The reason why stars can't be seen moving is because they are too far away from us. We can't see their movement and change in a short time, so they are called stars. Only after tens of thousands of years or even hundreds of thousands of years can the position of the stars change clearly.

　　 That's why Li Chunfeng said that Li Zexuan would not believe it when he saw the movement of stars!

　　 "It's true! It's true!"

Seeing Li Zexuan’s unbelief, Li Chunfeng hurriedly explained: “Just when the sky was completely dark, Pang Dao used a telescope to see a cluster of galaxies around the sun’s outline. This cluster of galaxies Pang Dao had observed last year. It's finished, but today during the total solar eclipse, the positions of some stars in that cluster of galaxies seem to have changed. Isn't this just the stars moving?"

　　 "...It's not that the stars are moving, but the direction of light has changed!"

　　 After listening to Li Zexuan, he quickly recalled some things from his previous life in his mind, and couldn't help but be suddenly shocked. Good fellow, this Li Chunfeng accidentally discovered an extraordinary thing!

In the world he lived in before, Newton stood on the shoulders of giants and saw the falling apples, so he realized the gravitational force between all things; Einstein stood on the shoulders of his predecessors and proposed a broad sense in 1915 According to the theory of relativity, he believes that gravity is a manifestation of the curvature of time and space.

　　 A major difference between Newton's and Einstein's view of space-time is about the influence of gravity on light.

Although classical dynamics predicts that the gravitational force of a star can deflect the path of photons, Einstein believes that this prediction is only a rough approximation of the actual situation. It is not the gravitational force of the star that pulls the photon, but the star bends the space structure, which is like standing The person on the trampoline bends the surface, and the photon is like a small ball rolling over the trampoline, moving along the curved structure.

　　From the perspective of photons, it always travels in a straight line, and the distortion of time and space causes the deflection of photons. Therefore, gravity is a manifestation of space curvature.

　　 Since the sun is the most massive object in our solar system, the curvature of time and space will be the most obvious. But in order to test general relativity, astronomers must study the position of background stars near the edge of the sun to determine the deflection angle of light passing near the sun—the deflection predicted by general relativity is twice as large as Newtonian mechanics.

　　 However, the sun is very bright, and it is impossible to see the background stars on the edge of the sun unless the sun is blocked-a total solar eclipse. During a total solar eclipse, the moon moves to the middle of the sun and the earth, just completely blocking the solar disk.

In 1917, Einstein's "little brother" Dyson conceived an experiment to map the positions of background stars near the edge of the sun during a total solar eclipse, and then compare them with the normal positions of these stars in the night sky, and you can observe Space-time distortion effect. This experiment was verified in 1919 and confirmed the correctness of Einstein's general theory of relativity!

Today, Li Chunfeng took advantage of the total solar eclipse and saw the shift of stars. This is not to prove Einstein’s general theory of relativity—massive stars can cause space-time bending phenomenon, and light travels in it and deflects, which is equivalent to passing through. A "gravitational lens" is created, so that people mistakenly believe that the position of the stars has changed, but in fact, the position of the stars has not changed.

　　 This Li Chunfeng is completely a scientist who was delayed by metaphysics!

　　 "The transmission direction of the light has changed? Hou Ye, I don’t understand. Isn’t this light propagating in a straight line? Would it still bend and spread?"

　　 Li Chunfeng heard Li Zexuan muttering to himself in a low voice, and couldn't help but wonder.

　　 He has "stayed" in Yanhuang Academy for more than half a year. In private, he often communicates with the gentlemen of the physics department such as Mo Huai and Mo Chui. He still understands some basic physics knowledge.

　　 Li Zexuan pondered for a moment, then slowly said:

"Li Daochang, under normal circumstances, light does travel in a straight line, but in some special cases, light does not travel in a straight line. For example, when light passes through ice or river water, it will be deflected. This is why fish When we fork the fish, we have to go to the position of the fish we saw, and then the reason for the deep fork a few inches! Because at that time, the fish we saw were not real fish, just illusions! "

　　 Li Chunfeng nodded slightly when he heard the words. He had heard of these theories from Mohuai and Mochui, and it was not difficult to understand, but...

"Master Hou, you can understand what you are saying, but the light from the stars that day, in the process of spreading, only passed through the vast space, and did not pass through ice, water, etc., according to your According to the "Physics" textbook, if the refractive index of the propagation medium has not changed, then the propagation direction of light will not change. Why do you say that the propagation direction of light has changed?"

　　 Li Chunfeng said with doubts.

　　 Li Zexuan couldn’t help but secretly said in his heart that Li Chunfeng still knows the physics of Yanhuang Academy quite well. He smiled and said:

"Lee Daochang, there is one thing I can tell you clearly that the stars in the sky cannot be seen moving in a short time. Only after tens of thousands of years or even hundreds of thousands of years can you clearly see the changes in their positions. The only explanation for the movement of the stars is that the light emitted by the stars deflects when passing near the sun, as if passing through a lens!

　　 As for why this weird phenomenon occurs, this requires the Taoist master to think about it himself! But Benhou can provide a hypothesis for Taoist leader that the sun, as a star, weighs far more than the earth, and the space near the sun is different from other places. When light passes by, it will be deflected or attracted by the sun. maybe! The specific reason needs to be considered by the Taoist! "

As the most famous **** stick in the Tang Dynasty, Li Chunfeng's life is undoubtedly extremely glorious, and even left a very strong and colorful stroke in the entire history of Chinese civilization. Li Zexuan now wants to pull Li Chunfeng into the pit of physics. , I want to see what kind of sparks a metaphysicist can collide with physics!

　　 In the 21st century, there is a popular saying that the end of science is metaphysics. When scientists climbed to the top of the mountain, the masters of metaphysics have been waiting here for a long time! Einstein once said: "Religion without science is lame, and science without religion is blind", "Space, time and matter are the illusion of human knowledge."

　　 Metaphysics belongs to the knowledge of interpreting the ontology of the universe. It mainly studies the ontology of Tao, which was initiated, inherited and developed by the ancestor of humanities, Fuxi-Huangdi-Wenwang-Laozi-Zhuangzi, that is, the essence of vitality. Ontology of vitality is a view of the universe with a strict logical system and is the core value of Chinese civilization. Take a closer look, a certain part of metaphysics actually has a shadow of science.

　　 Let a senior metaphysician go to study science. This kind of thing is very interesting to think about. Maybe Li Chunfeng will become a great scientific expert than Newton and Einstein in the future! This is definitely not impossible!

　　 After listening to Li Zexuan's words, Li Chunfeng's face gradually became dignified. After a long silence, he muttered to himself: "This star can change the direction of light propagation. It's incredible!"

In the past, he claimed to be proficient in metaphysics and could see all the people and things in the world. However, after talking with Li Zexuan, he suddenly felt a sense of insignificance. He felt that the knowledge in his mind was compared with Li Zexuan, and it was completely fireflies. Zhiguang competed with Haoyue for brilliance, and for the first time he had an unfathomable, unfathomable feeling towards Li Zexuan!

Li Zexuan smiled and said: "This is nothing incredible. The "Physics" currently taught in Yanhuang Academy is only relatively elementary. It does not involve the movement of celestial bodies. In the later advanced physics, students will be introduced to a force-universal gravitation. .

　　The heavier the object, the strongest gravitation is produced, and the weight of the star is heavier, which is incalculable by ordinary people, and the attraction it produces is stronger! Perhaps there is a kind of star with infinite weight and infinite gravity. It can swallow everything, maybe even the light around it can swallow it? "

　　 The thing he said later that can devour everything is a black hole!

　　 Li Chunfeng was shocked when he heard the words, his face was horrified and said: "If there are such stars, then all people in this world will experience the catastrophe of extinction?"

Li Zexuan shook his head and said, "Everything has its own definite number. As a Taoist person, how can he not even see this point! How vast is the universe? How vast are the heavens and stars? Who can tell? There must be no stars that can swallow everything as Benhou said? But even if they exist, they are not necessarily near our earth, because the universe is vast, and the earth in it is just like a dust~! It's just a matter of probability. In other words, the chance of us being swallowed is very small!"

　　 "The poor way is out of state! What Hou Ye said is reasonable~!"

　　 Li Chunfeng was ashamed, he bowed his hand to Li Zexuan, then he pondered for a moment, he said with a serious face: "Master Hou, there is a merciless request from the poor road, and I hope Master Hou will allow it~!"

　　 Li Zexuan's heart moved, and he hurriedly said politely: "If you have something to do with Daochang Li, I will definitely not refuse to do whatever he can."

　　 "Thank you Lord Hou~!"

Li Chunfeng first thanked him, and then said, "Master Hou! Pang Dao wants to stay in Yanhuang Academy. Pang Dao always feels that Master Hou's engineering seems to contain the supreme meaning of Taoist metaphysics. If you can penetrate it, Pang Dao Maybe we can successfully promote the national destiny of my Datang for hundreds or even thousands of years in the future~! This is the wish of a poor life~!"

　　 "Push Back Picture"~!

　　 Listening to Li Chunfeng's words, Li Zexuan subconsciously thought of the first bizarre book of Chinese Taoist prophecy-"Push Back Picture"! Legend has it that Li Shimin ordered the two famous Taoists Li Chunfeng and Yuan Tiangang to compile it in order to calculate the fortune of the Tang Dynasty. It integrates easy learning, astronomy, poetry, riddles and pictures.

Now that Yuan Tiangang has not yet entered the court, and Li Chunfeng is only in his twenties, naturally no one can write "Tui Bei Tu". After Li Chunfeng is proficient in physics and truly recognizes the universe, he will perform the "Tui Bei Tu". "What will it look like?" Li Zexuan himself is looking forward to it!

"Although you and I are not taught by the same person, they all come from the same line of Taoism. The request of the Taoist leader naturally has no reason to refuse. However, the knowledge of Yanhuang Academy can only be used by students and husbands of Yanhuang Academy. I know that the Taoist Master could learn some knowledge about "Physics" from Mr. Mo before, and it is already considered that Mr. Mo has violated the regulations of the academy.

　　 Since a while ago, Yanhuang Academy has begun to implement comprehensive confidentiality management. In the future, no one from Yanhuang Academy will be able to learn the knowledge of Yanhuang Academy! This is the decision of this Hou, and even more so, the decision of your majesty! The Daoist now works at the Taishi Bureau, who belongs to outside the Yanhuang Academy. According to the confidentiality regulations, you cannot stay in Yanhuang Academy to study engineering~! "

　　 Li Zexuan thought for a moment and shook his head.

He did want to pull Li Chunfeng into the "big pit" of physics, but the confidentiality regulations of Yanhuang Academy should not be trampled upon by anyone. In the past, Li Chunfeng was able to ask for some physics knowledge from Mohuai and Motribe because of that time. The college has not fully implemented the confidentiality regulations. Now that confidentiality management has begun, it must abide by the confidentiality regulations. If Li Chunfeng wants to stay in the academy, he must first resolve the identity problem~!

　　 Li Chunfeng was silent for a while, and said, "It turns out that the poor road had stolen academy engineering before. It was really Meng Lang. I apologize to Master Hou~!"

　　 Li Zexuan said with a smile: "The Daoist chief doesn't have to be like this, the previous academy system was not sound, no wonder you!"

Li Chunfeng suddenly brightened his eyes~www.readwn.com~ and said: "Since only people in Yanhuang Academy can learn engineering, I wonder if Lord Hou is willing to accept the student of Pang Dao? Pang Dao is willing to resign to his Majesty the General The post of Shi Lang~!"

　　 Li Chunfeng is going to be a student at Yanhuang Academy?

　　 Li Zexuan almost laughed when he heard this! Because Li Chunfeng’s son Li Yan is studying at Yanhuang Academy! In this way, wouldn't the father and son be in the same college?

　　 "Don't make it! Don't make it!"

After a pause, Li Zexuan quickly said: "The master's knowledge is enough for the master of the academy. How can you be a student? Moreover, the master has only learned throughout his life and is highly valued by the sacred. If this is not the case, the master will ask your majesty to see You can’t work as a teacher at Yanhuang Academy while working at the Taishi Bureau!"

　　 Li Chunfeng was greatly moved, he arched his hands and said, "In that case, I would like to thank Lord Hou! I will return to Chang'an from the poor road, and enter the palace to report to Ming Sheng~!"

　　 "Go!"

　　 Li Zexuan's face was calm, but he was happy in his heart. This accidentally pretended to be forced, and he gave the most famous sacred stick of the Tang Dynasty "Fudge" to the college as a teacher. This wave of blood earned!

　　 As for what "chemical reaction" Li Chunfeng can produce with engineering, only God knows, but Li Zexuan expressed his expectation!

　　………………………………

　　 First!

　　 Two in one chapter!

　　 Thank you Hans for the fifty thousand reward (March 26)

　　 (End of this chapter)