"You mean you saw the stars move? How is this possible?"
Yunshan Villa.
When Li Zexuan heard Li Chunfeng say that he saw the stars moving, he frowned subconsciously.
The stars that Li Chunfeng saw should be other stars outside the solar system. The reason why stars are called stars does not mean that stars do not move, but the movement of stars is definitely invisible to the naked eye in a short period of time.
There are no fixed celestial bodies in the universe. All celestial bodies are moving, but at different speeds. Stars not only move, but they also move at cosmic speeds. Take the sun, for example. It is rotating around the center of the Milky Way at a speed of about 250 kilometers per second.
Other stars move at equally astonishing speeds. The reason why stars appear motionless is because they are too far away from us, and we cannot see their movement in a short period of time, so they are called stars. It is only after tens or even hundreds of thousands of years that the changes in the star's position become apparent.
That's why Li Zexuan didn't believe Li Chunfeng when he said he saw the stars moving!
"It's true! It's true!"
Seeing Li Zexuan's face of disbelief, Li Chunfeng hurriedly explained: "Just when the sky was completely dark, Pindao used a telescope to see a cluster of galaxies around the outline of the sun. This cluster of galaxies was observed by Pindao last year. The painting is done, but during today’s total solar eclipse, the positions of some stars in the galaxy seem to have changed. Isn’t this just the stars moving?”
"...It's not that the stars are moving, but that the direction of light propagation has changed!"
After listening to this, Li Zexuan quickly recalled some things from his previous life in his mind, and he couldn't help being shocked. Good guy, Li Chunfeng discovered something extraordinary by accident!
In the world he lived in before, Newton stood on the shoulders of giants, saw the falling apple, and realized the universal gravitation between all things; Einstein stood on the shoulders of his predecessors and proposed the generalized theory of gravity in 1915 Theory of relativity, he believed that gravity is a manifestation of the curvature of space-time.
A major disagreement between Newton's and Einstein's views of space and time concerns the effect of gravity on light.
Although classical dynamics predicts that the gravity of a star can deflect the path of photons, Einstein believed that this prediction is only a rough approximation of the actual situation. It is not the gravity of the star that pulls the photons, but the star bends the structure of space. This is like standing on Just as the person on the trampoline curves the surface, the photons are like small balls rolling over the trampoline, moving along the curved structure.
From a photon's perspective, it always travels in a straight line, and the distortion of space-time causes the photon to deflect. Therefore, gravity is a manifestation of the curvature of space.
Since the Sun is the most massive object in our solar system, the resulting curvature of spacetime will be the most pronounced. But in order to test general relativity, astronomers must study the positions of background stars near the edge of the sun to determine the deflection angle of light as it passes near the sun—general relativity predicts a deflection that is twice as large as Newtonian mechanics.
However, the Sun is so bright that it is impossible to see the background stars at its edge without blocking the Sun's light - a total solar eclipse. During a total solar eclipse, the moon moves halfway between the sun and the earth, completely blocking the sun's disk.
In 1917, Einstein's "little fanboy" 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. Space-time distortion effect. This experiment was verified in 1919, confirming the correctness of Einstein's general theory of relativity!
Now, Li Chunfeng took advantage of the total solar eclipse to see the stars shift, which proved Einstein's general theory of relativity - massive stars will cause space-time curvature, and light will be deflected when it propagates through it, which is equivalent to passing through It creates a "gravitational lens" that makes people mistakenly think that the positions of the stars have changed, but in fact, the positions of the stars have not changed.
This Li Chunfeng is completely a scientist who was delayed by metaphysics!
"Has the direction of light transmission changed? Lord Hou, I don't understand. Doesn't this light propagate in a straight line? Could it be that it also propagates in a curved direction?"
Li Chunfeng couldn't help but be confused when he heard Li Zexuan muttering in a low voice.
He has been "staying" at Yanhuang Academy for more than half a year. In private, he often communicates with teachers from the physics department such as Mo Huai and Mo Chui. He still understands some basic physics knowledge.
Li Zexuan pondered for a moment and said slowly:
"Daozhang Li, under normal circumstances, light does travel along straight lines, but in some special cases, light does not travel along straight lines. For example, when light passes through ice or river water, it will be deflected. This is why fish is used This is why when spearing a fish, we have to spear it a few inches deeper to where we see the fish! Because at that time, the fish we see is not a real fish, it is just an illusion! "
Li Chunfeng nodded slightly when he heard this. He had heard these theories from Mo Huai and Mo Chui, and they were not difficult to understand, but...
"Master Hou, I understand what you said, but the light emitted by the stars in the sky only passed through the vast space during the propagation process, and did not pass through ice, water, etc., according to what you said It is said in the "Physics" textbook that if the refractive index of the propagation medium does not change, 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 in his eyes.
When Li Zexuan heard this, he couldn't help but secretly thought that Li Chunfeng was quite familiar with the physics of Yanhuang Academy. He smiled and said:
"Daozhang Li, one thing I can tell you clearly is that the stars in the sky cannot move in a short period of time. Only after tens of thousands or even hundreds of thousands of years can the changes in their positions be clearly seen, so you just The only explanation for the movement of the stars you see is that when the light from the stars passes near the sun, the propagation path is deflected, as if it has passed through a lens!
As for why this strange phenomenon occurs, the Taoist priest needs to think about it himself! However, I can provide the Taoist priest with a hypothesis, that is, the sun, as a star, weighs far more than the earth. The space near the sun is different from the space elsewhere. When the light passes through, it will be deflected or attracted by the sun. maybe! The specific reason needs to be considered by the Taoist priest himself! "
As the most famous magic stick in the Tang Dynasty, Li Chunfeng's life was undoubtedly extremely glorious, and he even left a very strong mark in the entire history of Chinese civilization. Li Zexuan now just wants to drag Li Chunfeng into the pit of physics. , I want to see what kind of sparks a metaphysician can create when he collides with physics!
In the 21st century, there is a popular saying that the end of science is metaphysics. When scientists climb to the top of the mountain after all the hard work, the masters of metaphysics (Buddhism) 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 illusions of human understanding."
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 Fuxi, Huangdi, King Wen, Laozi and Zhuangzi, the ancestors of humanities, that is, the ontology of vitality. Yuanqi ontology is a cosmology with a strict logical system and is the core value of Chinese civilization. If you look closely, you will see that some aspects of metaphysics actually have a shadow of science.
It is very interesting to think about letting a senior metaphysician study science. Maybe Li Chunfeng will become a scientific master who is more powerful 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 serious. After being silent for a while, he murmured to himself: "It's incredible that this star can actually change the direction of light propagation!"
He used to boast that he was proficient in metaphysics and could see all the people and things in the world clearly, but now after talking to Li Zexuan, he suddenly felt insignificant. He felt that the knowledge in his mind was like a firefly compared to Li Zexuan. The light of the sun competed with the bright moon, and for the first time, he had an unfathomable, mountain-like feeling towards Li Zexuan!
Li Zexuan said with a smile: "This is not surprising. The "Physics" currently taught in Yanhuang Academy is only relatively elementary and does not involve the movement of celestial bodies. When the advanced physics comes later, students will be introduced to a kind of force - universal gravitation. .
The heavier the object, the stronger the gravitational force it generates. The weight of the star is even greater, and it is difficult for mortals to estimate, and the attraction it generates is stronger! Maybe there is a kind of star with infinite weight and infinite gravity. It can swallow everything, maybe even the light around it? "
The thing he mentioned later that can swallow everything is a black hole!
When Li Chunfeng heard this, his expression changed with horror. He said with a horrified look on his face: "If there is such a star, wouldn't all the people in this world have to experience a catastrophe?"
Li Zexuan shook his head and said: "The birth and death of all things have their own destiny. As a Taoist, how can the Taoist master not see this clearly! How vast is the universe? How vast are the stars in the sky? Who can say for sure? There must be no star that can swallow everything as I mentioned. But even if it exists, it may not be near our earth, because the universe is vast and the earth is just a grain of dust in it~! Just based on probability In other words, the chance of us being swallowed up is extremely small!"
"I have lost my temper! What the Marquis said makes sense~!"
Li Chunfeng looked ashamed. He bowed his hands to Li Zexuan and bowed. Then he pondered for a moment and said seriously: "Master Marquis, I have a merciless request. I hope you will allow it~!"
Li Zexuan's heart moved, and he quickly said politely: "If you have anything to say, Daoist Master Li, just say it. I will do my best and I will not refuse~!"
"Thank you, Mr. Hou~!"
Li Chunfeng first thanked him, and then said: "Master Hou! I want to stay in Yanhuang Academy. I always feel that your engineering studies, Master Hou, seem to contain the supreme meaning of Taoist metaphysics. If I can understand it thoroughly, I will Perhaps we can successfully deduce the fate of our country in the next hundreds or even thousands of years of the Tang Dynasty~! This is what I have always wanted in my life~!"
"Push Back Picture"~!
Hearing what Li Chunfeng said, Li Zexuan subconsciously thought of the first wonderful book of Chinese Taoist predictions - "Tui Bei Tu"! Legend has it that Li Shimin ordered two famous Taoists at the time, Li Chunfeng and Yuan Tiangang, to compile it in order to calculate the fortunes of the Tang Dynasty. It integrates Yixue, 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 "Tuibei Diagram". Then when Li Chunfeng is proficient in physics and truly understands the ontology of the universe, how can he deduced "Tuibei Diagram"? 》What will it look like? Li Zexuan himself is looking forward to it very much!
"Although you and I don't learn from the same person, we both come from the Taoist lineage. There is no reason why I should not refuse the Taoist priest's request. However, the knowledge of Yanhuang Academy can only be taught by the students and teachers of Yanhuang Academy." You know, the Taoist Master was able to learn some knowledge about "Physics" from Mr. Mo before, which can be regarded as a violation of the academy regulations by Mr. Mo and others.
Since a while ago, Yanhuang Academy has begun to fully implement confidentiality management. From now on, no one from Yanhuang Academy will be able to learn the knowledge of Yanhuang Academy! This is my decision, and even more so, His Majesty’s decision! The Taoist Master now works for the Taishi Bureau and belongs to someone 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 wanted to drag 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 was able to get some physics knowledge from Mo Huai and Mo Chui. That was because at that time The academy has not fully implemented 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 issue~!
Li Chunfeng was silent for a long time, then he cupped his hands and said: "I see, Pindao secretly studied engineering in the academy before, and it was really Meng Lang. I would like to apologize to the Marquis~!"
Li Zexuan smiled and said: "Taoist master, you don't have to be like this. The academy system was not perfect before, so I can't blame you!"
Li Chunfeng's eyes suddenly lit up and he said: "Since only people from the Yanhuang Academy can learn engineering, then I wonder if the Marquis is willing to accept Pin Dao as a student? Pin Dao is willing to resign to His Majesty as a general in the Taishi Bureau~! "
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 studied at Yanhuang Academy! In this way, wouldn't it mean that father and son are in the same academy together?
"I can't do it! I can't do it!"
After a pause, Li Zexuan hurriedly said: "The Taoist priest's knowledge is enough to serve as a teacher in the academy, so how can I become a student? Moreover, the Taoist priest has learned all his life and is highly regarded by the saints. If this is not the case, the Taoist priest will ask His Majesty for instructions to see if he can You can't be a teacher at Yanhuang Academy while working for the Taishi Bureau!"
Li Chunfeng was greatly moved. He cupped his hands and said, "In that case, I would like to thank you Lord Marquis! I will return to Chang'an now and enter the palace to report to the Holy Emperor~!"
"Go!"
Li Zexuan's face remained calm, but his heart was full of joy. This time he accidentally pretended to be cool and "fooled" the most famous magician in the Tang Dynasty to become a teacher in the academy. What a huge profit!
As for what kind of "chemical reaction" Li Chunfeng can have with engineering, only God knows, but Li Zexuan said he is looking forward to it!
…………………………
First update!
Two chapters in one!
Thanks to Hans for the fifty thousand reward (March 26)
(End of chapter)
