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

Unsan Annex.

Li Zexuan heard Li Chunfeng say that he saw the stars moving, and subconsciously frowned.

The reason why stars are called stars is not that the stars will not move, but the movement of the stars is absolutely invisible with the eyes in a short period of time.

There are no immobile celestial bodies in the universe, all celestial bodies are in motion, but the speed is different. Stars not only move, but they move at high speeds of the universe. The Sun, for example, is orbiting the center of the Milky Way at a speed of about 250 kilometers per second.

Other stars are moving at incredible speeds. The reason why stars don't move is because they are so far away from us that we can't see their movement change in a short period of time, so they are called stars. Only after tens or even hundreds of thousands of years can the change in the position of the star become apparent.

So Li Chunfeng said that when he saw the stars moving, Li Zexuan would not believe it!

"It's true! It's true! ”

Seeing Li Zexuan's disbelief, Li Chunfeng hurriedly explained: "Just when the sky was completely dark, Poor Dao used a telescope to see a cluster of galaxies around the outline of the sun, this galaxy Poor Dao had observed last year, and the star map was drawn, but during today's total solar eclipse, the positions of some stars in that galaxy seem to have changed, isn't this just that the stars are moving?" ”

“…… It's not the stars that are moving, it's the direction of light that has changed! ”

After Li Zexuan heard this, he quickly recalled some things in his previous life in his mind, and he couldn't help but be suddenly shocked in his heart, good guy, this Li Chunfeng made a casual discovery, and he found an amazing thing!

In the world in which he had lived before, Newton stood on the shoulders of giants, saw the falling apples, and realized the gravitational pull between all things; Standing on the shoulders of his predecessors, Albert Einstein proposed the general theory of relativity in 1915, arguing that gravity is the manifestation of the curvature of space-time.

A major disagreement between Newton's and Einstein's view of space-time was about the effect of gravity on light.

Although classical dynamics predicted that the gravitational pull of a star could deflect the path of a photon, Einstein believed that this prediction was only a rough approximation of the actual situation, not that the gravitational pull of the star pulling the photon, but that the star bent the structure of space, just like a person standing on a trampoline bends the surface, and the photon is like a ball rolling over a trampoline, moving along the curved structure.

From a photon's point of view, it always travels in a straight line, and the distortion of space-time leads to the deflection of the photon. 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 space-time will be the most noticeable. But to test general relativity, astronomers must study the position of background stars near the Sun's edge to determine the angle of deflection that occurs when light passes near the Sun—a deflection predicted by general relativity that is twice as large as Newtonian mechanics.

However, the Sun is so bright that it is impossible to see the background stars at the edge of the Sun unless the sun's light is blocked – a total solar eclipse. During a total solar eclipse, the Moon orbits halfway between the Sun and the Earth, just blocking the Sun's disk completely.

In 1917, Albert Einstein's "little fan" James Dyson conceived an experiment in which the space-time distortion effect could be observed by plotting the positions of background stars near the edge of the Sun during a total solar eclipse and then comparing them with their normal positions in the night sky. This experiment, verified in 1919, confirmed the correctness of Einstein's general theory of relativity!

Now, Li Chunfeng took advantage of the total solar eclipse to see the shift of the stars, which proves Einstein's general theory of relativity - massive stars will cause space-time bending, and light will travel in them, which will be deflected, which is equivalent to passing through a "gravitational lensing", 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 has been delayed by metaphysics!

"The direction of light transmission has changed? Master Hou, poor Dao doesn't understand, doesn't this light spread in a straight line? Will it still bend and spread? ”

Li Chunfeng heard Li Zexuan's low muttering, and couldn't help but be puzzled.

He has been "staying" in Yanhuang Academy for more than half a year, and in private he often communicates with the gentlemen of the physics department, such as Mohuai and Mochui, and he still understands some basic physics knowledge.

Li Zexuan pondered for a moment and said slowly:

"Li Daochang, under normal circumstances, light does travel along a straight line, but in some special cases, light will not travel along a straight line, for example, light will deflect when passing through ice and river, which is why when using a harpoon to spear fish, we have to fork a few inches deeper into the position of the fish we see! Because at that time, the fish we saw was not a real fish, it was just an illusion! ”

When Li Chunfeng heard this, he nodded slightly, he had heard of these theories from Mohuai and Mochui, and it was not difficult to understand, but ......

"Master Hou, what you said, poor Dao understands, but the light emitted by the stars in the sky, in the process of propagation, is just through the vast space, not through ice, water, etc., according to what you said in the "Physics" textbook, the refractive index of the propagation medium has not changed, so the propagation direction of light will not change, why do you say that the transmission direction of light has changed?"

Li Chunfeng said with a puzzled look.

When Li Zexuan heard this, he couldn't help but secretly say in his heart that Li Chunfeng still knew a lot about the physics of Yanhuang Academy, he smiled and said:

"Daochang Li, there is one thing that Ben Hou can clearly tell you that the stars in the sky are invisible in a short period of time, and only after tens of thousands or even hundreds of thousands of years can they clearly see the change in their positions, so the only explanation for the movement of the stars you just saw is that the light emitted by the stars is deflected when it passes near the sun, as if it has passed through a lens!

As for why this strange phenomenon occurs, this needs to be thought about by the Taoist himself! However, Ben Hou can provide a hypothesis for the Taoist, that is, the sun, as a star, weighs much more than the earth, and the space near the sun is different from the space in other places, and it is possible that light will be deflected or attracted by the sun as it passes by! What is the specific reason, you need to think about it yourself! ”

As the most famous god stick in the Tang Dynasty, Li Chunfeng's life is undoubtedly extremely glorious, and even in the long history of Chinese civilization, he has left a very strong stroke, Li Zexuan now wants to pull Li Chunfeng into the big pit of physics, and wants to see what kind of sparks can be produced by the collision between a metaphysician and physics!

In the 21st century, there is a popular saying that the end of science is metaphysics, and when scientists climb to the top of the mountain, the masters of metaphysics (Buddhism) have been waiting here for a long time! Albert Einstein once said: "Religion without science is lame, science without religion is blind", "space, time and matter are the illusions of human cognition".

Metaphysics belongs to the study of interpreting the ontology of the universe, mainly studying the ontology of the Tao that was opened, inherited and developed by the ancestor of humanities, Fuxi, Yellow Emperor, King Wen, Laozi and Zhuangzi, that is, the ontology of Yuanqi. The ontology of vitality is a cosmology with a rigorous logical system, which is the core value of Chinese civilization. If you take a closer look, a certain part of metaphysics actually has the shadow of science.

Let a senior metaphysician study science, this kind of thing, it is very interesting to think about, maybe Li Chunfeng will be able to become a science master who is better than Newton and Einstein in the future! It's definitely not impossible!

After listening to Li Zexuan's words, Li Chunfeng's face gradually became solemn, and after being silent for a long time, he muttered to himself: "It's unbelievable that this star can actually change the direction of light propagation!" ”

In the past, he claimed to be proficient in metaphysics and could see all the people and things in the world, but now when he talked to Li Zexuan, he suddenly had a feeling of insignificance, he felt that the knowledge in his mind was compared with Li Zexuan, it was completely the light of the fireflies and the bright moon, and he had an unfathomable feeling of unfathomable and high mountains for Li Zexuan for the first time!

Li Zexuan said with a smile: "This is nothing unbelievable, the "Physics" taught by Yanhuang Academy now is only relatively rudimentary, and it does not involve the movement of celestial bodies.

The heavier the object, the stronger the gravitational attraction it generates, and the greater the weight of the star, which is immeasurable to mortals, and the stronger the attraction it generates! Maybe there is a star with infinite weight and infinite gravitational pull, which can swallow everything, even the light around it? ”

The thing he said later that could devour everything was a black hole!

When Li Chunfeng heard this, he changed color in shock, and he said with a frightened face: "If there really is such a star, then wouldn't all the people in this world have to experience the catastrophe of annihilation?" ”

Li Zexuan shook his head and said: "All things are born and perished, they have their own fixed number, and as a Taoist person, how can he not even see this point clearly!" How vast is the universe? How vast are the heavens and stars? Who can say for sure that there must not be a star that can devour everything, as Ben Hou said? But even if it exists, it is not necessarily near our earth, because the universe is vast, and the earth is just a speck of dust in it~! In terms of pure probability, the chances of us being devoured are very small! ”

"The poor road is out of shape! What Hou Ye said is reasonable~! ”

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

Li Zexuan's heart moved, and he hurriedly said politely: "Although Daochang Li has something to say, if Ben Hou does what he can, he will not refuse~!" ”

"Thank you, Master Hou~!"

Li Chunfeng first thanked him, and then said, "Master Hou! Poor Dao wants to stay in Yanhuang Academy, Poor Dao always feels that Hou Ye, your engineering, seems to contain the supreme meaning of Taoist metaphysics, if you can understand it, Poor Dao may be able to successfully deduce the national fortune of my Tang Dynasty in the next hundreds, or even thousands of years~! This is what Poor Dao wishes in his life~! ”

"Push Back Picture"~!

Listening to Li Chunfeng say this, Li Zexuan subconsciously thought of the first strange book of Chinese Taoist prophecy - "Tui Bei Tu"! Legend has it that it was written by Li Shimin in order to calculate the fortunes of the Tang Dynasty and ordered two famous Taoist priests at that time, Li Chunfeng and Yuan Tiangang. 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", so when Li Chunfeng is proficient in physics and truly understands the universe itself, what will the "Tui Bei Tu" look like? Li Zexuan himself is looking forward to it!

"Although you and I are not a teacher, but they are both from the Taoist lineage, the request of the Taoist chief, Ben Hou naturally has no reason not to agree, but the knowledge of Yanhuang Academy can only be known by the students and gentlemen of Yanhuang Academy, and the Taoist chief was able to learn some knowledge about "Physics" from Mr. Mo before, which is already considered Mr. Mo They violated the rules of the academy.

Since a while ago, Yanhuang Academy has begun to fully implement confidentiality management, and no one from Yanhuang Academy will be able to learn the knowledge of Yanhuang Academy in the future! This is the decision of Ben Hou, and it is the decision of His Majesty! And the Taoist is now working in the Taishi Bureau, and he is a person outside the Yanhuang Academy, according to the confidentiality regulations, you can't stay in the Yanhuang Academy to study engineering~! ”

Li Zexuan pondered for a moment and shook his head.

He really wanted 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, that is because the academy had not fully implemented the confidentiality regulations at that time, and now that the confidentiality management has begun, then the confidentiality regulations must be observed, if Li Chunfeng wants to stay in the academy, he must first solve the identity problem~!

Li Chunfeng was silent for a long time, and arched his hand: "I see, Poor Dao stole the academy engineering before, it is really Meng Lang, I apologize to Lord Hou here~!" ”

Li Zexuan said with a smile: "Dao Elder doesn't have to be like this, it was the academy system that was not sound before, no wonder you!" ”

Li Chunfeng's eyes suddenly lit up, and he said, "Since only the people inside Yanhuang Academy can learn engineering, I wonder if Master Hou is willing to accept this student of Poor Dao?" Poor Dao is willing to resign from His Majesty the post of General Shilang of the Taishi Bureau~! ”

Li Chunfeng wants to be a student at Yanhuang Academy?

When Li Zexuan heard this, he almost laughed! Because Li Chunfeng's son Li Yan is studying in Yanhuang Academy! In this way, isn't father and son in the same academy?

"I can't do it! I can't help it! ”

After a pause, Li Zexuan hurriedly said: "The knowledge of the Taoist is enough to be the gentleman of the academy, how can he be a student?" Moreover, the Taoist has only learned all his life, and he is quite valued by the saints, if this is the case, the Taoist will go to ask His Majesty to see if he can be a gentleman in Yanhuang Academy while taking on the errand of the Taishi Bureau! ”

Li Chunfeng was greatly moved, he arched his hand and said: "Since this is the case, thank you Hou Ye!" Poor Dao will return to Chang'an and enter the palace to worship the saint~! ”

"Go ahead!"

Li Zexuan's face was silent, but his heart was happy, this accidentally pretended to be forced, and he "fooled" the most famous god stick in the Tang Dynasty to the academy as a teacher, this wave of blood to earn!

As for what "chemical reaction" Li Chunfeng can have with engineering, only God knows, but Li Zexuan said that he was looking forward to it!

………………………………

First update!

2-in-1 chapter!

50,000 thanks to Hans (26 March)

(End of chapter)