Otaku Engineer in Great Tang Dynasty Chapter 1395: Science and Metaphysics! (Thanks Hans for the reward!)
"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. Not only do stars move, they also move at a high speed at the speed of the universe. Take the sun, for example, it is spinning 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 do not move is because they are too far away from us. We can't see their movement 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 stars be clearly seen.
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 face of disbelief, 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. The star maps are all drawn, but during the total solar eclipse today, 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, Li Zexuan quickly recalled some things from the previous life in his mind, and couldn't help but be suddenly shocked. Good guy, this Li Chunfeng accidentally discovered, and discovered an incredible thing!
In the world he was in before, Newton stood on the shoulders of giants and saw the falling apple, so he realized the gravitational force between all things; Einstein stood on the shoulders of his predecessors, in 1915 He put forward the general theory of relativity, he believed that gravity is the appearance of the curvature of time and space.
A major difference between Newton and Einstein's view of space-time is about the influence of gravity on light.
Although classical dynamics predicts that the gravity of a star can deflect the path of a photon, Einstein believes that this prediction is only a rough approximation of the actual situation. It is not the gravitational pull of the star that pulls the photon, but the star bends the space structure. Like a person standing on a trampoline bending the surface, the photon is like a small ball rolling over the trampoline, moving along the curved structure.
From the perspective of a photon, it always travels in a straight line, and the distortion of time and space causes the photon to deflect. 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 when 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 sunlight 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. The space-time distortion effect can be observed. 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 phenomena, and light travels in them and deflects. It is equivalent to going through a "gravitational lens", 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. Doesn’t this light travel in a straight line? Does it still spread in a bend?"
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 physics department of 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 along a straight line, but in some special cases, light does not travel along a straight line. For example, when light passes through ice blocks or river water, it will be deflected. This is Why do we need to go to the position of the fish we saw when we spear the fish with a harpoon, and then a few inches deep! Because at that time, the fish we saw were not real fish, but just It's a fake!"
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 on that day only passed through the vast space, not ice, water, etc. According to what you said in the "Physics" textbook, if the refractive index of the propagation medium has not changed, the propagation direction of light will not change. Why do you say that the propagation direction of light has changed?"
Li Chunfeng said in doubt.
Li Zexuan heard this, and couldn’t help but secretly said that Li Chunfeng still has a good understanding of the physics of Yanhuang Academy. 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 or even hundreds of thousands of years can they clearly see the changes in their positions. So the only explanation for the movement of the stars you just saw is that the light from the stars deflects when passing near the sun, as if passing through a lens!
As for why this weird phenomenon occurs, this requires the Daoist to think about it himself! But Ben Hou can provide a hypothesis for the 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 deflect or be attracted by the sun. maybe! What is the specific reason, you need to think about it yourself! "
As the most famous sacred stick in the Tang Dynasty, Li Chunfeng’s life is undoubtedly extremely glorious, and even in the entire history of Chinese civilization, it has left a very strong and colorful stroke. Li Zexuan now wants to pull Li Chunfeng into physical In the big pit, 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 with great pains, 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 that was initiated, inherited and developed by the ancestor of the humanities Fuxi-Huangdi-Wenwang-Laozi-Zhuangzi, that is, the ontology 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 be able to 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!"
He used to claim that he was proficient in metaphysics and could see all the people and things in the world, but now talking to Li Zexuan, he suddenly felt a sense of insignificance. He felt that the knowledge in his mind was compared with Li Zexuan, completely It was the glow of the fireflies and the bright moon, and for the first time he had an unfathomable, unfathomable feeling towards Li Zexuan!
Li Zexuan said with a smile: "This is nothing incredible. The "Physics" currently taught in Yanhuang Academy is only relatively elementary. It does not involve celestial movement. In the later advanced physics, students will be introduced to a kind of force. -Gravity.
The heavier the object, the strongest gravitation is produced. The weight of the star is heavier. It is hard for mortals to estimate, and the attraction it produces is stronger! Maybe there is a kind of star with infinite weight and infinite gravity. It can swallow all things, 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, wouldn't everyone in this world experience the catastrophe?"
Li Zexuan shook his head, and said: "All things are born and die, and there is a definite number. As a Taoist person, how can he not even see this! How vast is the universe? How vast is the sky and stars? Who can conclude that 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 particle of dust~! In terms of probability, 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, and then pondered for a moment, he said with a serious expression: "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 what I can do~!"
"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 profound meaning of Taoist metaphysics. If you can understand it , Poor Dao may be able to successfully promote our national fortune for hundreds or even thousands of years in the future of Datang~! This is what Poor Dao’s life wants~!"
"Push Back Picture"~!
Hearing Li Chunfeng said this, 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 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 " What will "Push Back Picture" 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 Taoist line. The request of the Taoist school is naturally not unreasonable. However, the knowledge of Yanhuang Academy can only be learned by Yanhuang Academy. The students and husband know that the Taoist master can learn some knowledge about "Physics" from Mr. Mo before, and it is 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 it is the decision of your majesty! The Taoist Chief now works in the Taishi Bureau, who belongs to outside the Yanhuang Academy. According to the confidentiality regulations, you cannot stay in the Yanhuang Academy to study engineering~! "
Li Zexuan thought for a moment and shook his head.
It is true that he wants to pull Li Chunfeng into the "big pit" of physics, but no one can trample on the confidentiality regulations of Yanhuang Academy. In the past, Li Chunfeng could ask for some physics knowledge from Mohuai and Mochui, then The reason is that the academy did not fully implement confidentiality regulations at the time. 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, "That's it, the poor road had previously stolen academy engineering. It was really Meng Lang. I apologize to Lord 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’s eyes suddenly brightened~IndoMTL.com~ said: "Since only people in Yanhuang Academy can learn engineering, I wonder if Hou Ye is willing to accept the student of Pang Dao? Pang Dao is willing to resign from Taishi Bureau to His Majesty General Shiro~!"
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!"
paused for a moment, Li Zexuan hurriedly said: "The master's knowledge, the master of the academy is enough, how can you be a student? And the master has only learned in his lifetime, and it is highly valued by the sacred. , Let’s see if we can work as a teacher at the Yanhuang Academy while working at the Taishi Bureau!"
Li Chunfeng was very moved, he arched his hands and said: "So, thank you Lord Hou! I will go back to Chang'an on the poor road, and go to the palace~!"
"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. what!
As for the "chemical reaction" Li Chunfeng can produce with engineering, only God knows, but Li Zexuan expressed his expectation!
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First!
two in one chapter!
Thank you Hans for the fifty thousand reward (March 26)
(End of this chapter)