Great Song

The spectacle of the copper pendulum deflecting caused many people to be suspicious, but after watching it for a long time, it was just like that.Many people just watched the excitement, clicked their tongues twice, and then turned and left.Zhen Qiong watched for more than two hours, and left satisfied after the pendulum deflected westward by one-eighth of a circle.

There are quite a few curious people like Zhen Qiong.So much so that there were always people watching in front of the wooden platform. If it wasn't for the midnight curfew, some people would probably want to sleep in the open in front of the Daxiangguo Temple.

Such a grand occasion is naturally a good thing for Feng's shop.So the store didn't dismantle the table immediately, but sent someone to erect a wooden plank in front of the table, and painted the pattern on the sand intact.Why such a strange thing happened, no one can say clearly, but don't delay the discussion of those who have good things.It would be even better if someone mistakenly thinks that this is their superb pendulum-making skills, and that the self-ringing clock is better than the Han family.

Therefore, with people's deliberate push and fuel, the news spread more and more widely, and even the senior officials in the DPRK and China heard about it.

Zhang Zai's life is not easy these days.He promoted the Art of War with all his strength, but trying it out on Huanqing Road was very different from Tongtianxia.The situation in each prefecture and prefecture is different, and the military roads along the border also have their own chronic diseases. It can be imagined that it will take a lot of energy to sort them out one by one.Therefore, in the Privy Council, he also works with the file every day.

However, no matter how busy the business is, no matter how chaotic the personnel affairs are, Zhang Zai will not take it to heart.It happened that it involved his own basic Confucian classics, which upset him.The previous "vacuum theory" and "air pressure theory" gave Zhang Zai full confidence that the atmosphere is the foundation of all things, and his theory of qi is the theory that confirms the principle of heaven and earth.

Unexpectedly, at this time, Cheng Yi, who had been studying "Confucianism" behind closed doors, unexpectedly came out of the gate and came up with a new set of theories.He not only bluntly stated that "Tianli" comes first, but also criticized the theory of vacuum as too false, and then re-explained the "Huntian theory".This is the opposite of Zhang Zai's qi.Although Zhang Zai knew that Cheng Yi was asking for his name, his words may not be without flaws.However, the problem is that the "Xuan Ye Theory" advocated by Qi Xue also has loopholes.

If the sky is infinite, how can the trajectories of the stars be explained?You can't borrow the "huntian theory" anymore, can you?Zhang Zai wanted to find a more complete theory to complete the universe in "Xuan Ye Shuo".

Maybe it's because the earth has gravitational force that it can absorb the sun, moon and stars?Zhang Zai was confused, but he was not as eager as Cheng Yi, he still hoped to find a more reasonable explanation than "gravity is lighter in the east and heavier in the west".This made him fall into deeper troubles.

Looking at the sun rising and setting every day, sometimes he couldn't help but wonder, is the sun he saw yesterday the same as the sun he saw today?If they are the same, why are they suddenly far and near?If it is different, why does it rise in the east and fall in the west, and remains unchanged forever.

Perhaps in the vast sky, there are countless sky suns like air masses, some are cold and some are warm, alternating and changing, just like the golden crow shot down by Hou Yi.

But these thoughts were only fleeting.Zhang Zai still pays more attention to the world's inspection and inference of all things in the world, just like those described in "Mengxi Bi Tan" and "On Good Fortune".The Dao is inherent in nature, but it depends on whether you have the talent and perseverance to explore it.

Therefore, after hearing about the pendulum in front of Daxiangguo Temple, Zhang Zai also became curious.Taking advantage of Xiumu, he took a few disciples to watch, and went to watch together.

It has been displayed for several days, and there are not as many people in front of the wooden platform as before. Zhang Zai and others walked to the front with ease.After seeing clearly the huge copper pendulum that kept swinging, the disciples all exclaimed.Another one was even more surprised when he saw the yarn diagram standing in front of the wooden frame: "Teacher, the pattern drawn by this pendulum is actually a circle. What is the reason?"

Zhang Zai didn't hear the other party's words, he just stared at the trajectory of the pendulum.Now, the few disciples didn't dare to say more, and stood in front of the wooden frame with their teacher to observe.It was okay at the beginning, everyone looked at the pendulum, looked at the sand paintings, and occasionally observed the people watching around, which can somewhat pass the time.However, I didn't expect that Zhang Zai stood still for more than half an hour, and he followed like a demon.

Also worried about his health, some disciples couldn't help but said: "Teacher, do you want to rest at the tea stand in front?"

Because there are too many spectators, many stalls have been set up in front of the wooden frame, selling everything, and there is no shortage of places to rest.

Unexpectedly, Zhang Zai shook his head, and suddenly asked, "Have you ever read Meng Xisheng's article in the sixth issue of "On Good Fortune"?"

"I have read it." The disciple replied hastily.Nowadays, in the study of qi, it is necessary to read "Mengxi Bi Tan" and "On Good Fortune".The former is more relaxed and interesting to read, while the latter is very difficult and makes people headache.However, in the sixth issue, Meng Xisheng's explanation of "force" is really simple and easy to understand, and it is also memorable.

"If there is no external force, all movement will go straight, and all stillness will remain static." Zhang Zai stretched out his finger and pointed to the pendulum in front of him, "Does this thing travel in a straight line?"

Looking at the straight lines drawn on the fine sand and the semicircular fan formed by many straight lines, the disciple hesitated to answer for a moment.The pendulum is indeed swinging in a straight line, but the trajectory drawn has shifted, which is really weird.

Before waiting for the disciples' answers, Zhang Zai raised his head to look at the sky, and the wooden frame that went straight into the sky, and murmured: "There is no wind, no mechanism, no external force, why does it deflect?"

This question is still unanswered.So Zhang Zai stopped asking, and continued to stand in front of the wooden platform, concentrating on the swinging copper pendulum.This stop is one afternoon.The chiming bell rang again and again, and seeing the sun slipping from the sky, the disciples couldn't bear it anymore, and persuaded: "Teacher, it's getting dark, it's time to rest. "

How can a person in his fifties survive standing under the sun for two or three hours?Not to mention, Zhang Zai's health is not good, which makes the disciples worry even more.

This sentence was very common, but Zhang Zai was shocked when he heard it, and looked up at the sky.The brilliant sun has now become orange red, dyeing half of the clouds.Even if the summer is long, it will only take a while before the mountain will fall.

This is a scene that can be seen every day, but at this moment, in Zhang Zai's eyes, it is dazzling.He quickly lowered his head again, looking at the sand table.After standing for an entire afternoon, the pendulum had already left its original position, drawing a small half arc.The copper pendulum was weak, and it was unknown when it would stop.Zhang Zai ignored it, and just stared blankly at the lines on the sand.If the "ten" drawn in white ash is used as the marking line, wouldn't the copper pendulum also deflect to the west?

A thing in motion cannot turn without an external force.What could it be that made the dozens of kilograms of copper pendulum deflect silently?

Zhang Zai raised his foot suddenly, and stomped the ground under his foot vigorously.

"Teacher!" "Teacher, is your leg numb?"

A group of disciples exclaimed and helped, but Zhang Zai pushed them away, pointing directly at the swaying copper pendulum: "The frame does not move, the person does not move, the wind does not move. Is it the pendulum that moves, or the ground under your feet?"

This question was so bizarre that all the disciples were stunned.Could it be that the mentor was trapped by difficult problems and fell into hysteria?

A disciple boldly said: "Teacher, how can the earth move? Aren't we all standing here and never leaving..."

"That's because we are all standing on the ground and moving wherever we want. The pendulum is hanging in the air, so it didn't move at all just now! Why is it deflected, and why is it drawing a circle? Can't you figure it out clearly! This is the earth moving , from west to east, spinning non-stop!" Zhang Zai's voice was a little hoarse, he had completely forgotten his decades of nourishing Qi, and he wished he could roar out.

This sentence made everyone around him change their faces.Can the ground move?Will it keep spinning?There is no such reason!However, if this is not the case, why does the pendulum keep spinning?Why are circles always drawn instead of other shapes?But this is completely different from what everyone has learned!

Looking at the stunned disciples, Zhang Zai turned his head and looked at the setting sun that was about to end again.He suddenly laughed, and whispered softly while laughing: "Yes. Yesterday's day is today's day, and today's day must also be tomorrow's day. The difference between day and night is never the sun and the moon, only the earthquake That's all."

Earthquakes produce day and night, and the movement of the sun produces four seasons. "Xuan Ye Shuo" is never false, it's just that no one sees the key to it.

With that shallow smile, Zhang Zai turned his head to look at the copper pendulum and the sand painting under it, and suddenly frowned again.Since it is an earthquake, why not draw a perfect circle day and night?According to the current deflection speed, I am afraid that it is not possible to draw more than half a circle in a day and night. What is the reason for this?

■

"If the earth rotates on its own axis, shouldn't it take twelve hours to make a full circle? Why can the hanging pendulum only make half a circle in one day?" After watching the hanging pendulum, Zhen Qiong was very happy, so she had to ask the people around her for advice. able man.

Hearing this, Su Song smiled slightly and explained: "Since the earth is a sphere, every place should have a curvature. This curvature will cause the rotation speed of the pendulum to change. Inference from this, if the pendulum is placed at the poles at both ends If it is placed on the equator, which is the widest point in the middle, it will not move at all, and even the deviation will not be seen. Now that we know the speed of rotation here, we can also calculate where we are on the earth gone."

With that said, he took the charcoal pencil and began to write on the paper.Not only is there a circle imitating the earth, but there are also line-by-line calculations, and finally a point is marked on the circle.

Zhen Qiong's eyes widened: "Is this our position? It can be calculated! It seems a bit far away from the equator?"

"Tokyo has four distinct seasons, so naturally it won't be too close to the equator." Su Song put down his pen and smiled slightly, "After Lingnan, the climate will become hotter and humid, and it must be because of the proximity to the equator."

In fact, the term "equator" was originally the name of the central circle of the "celestial sphere", but now that the earth is also a sphere, he used it directly.

"Then the speed of the pendulums in all places will be different?" Zhen Qiong couldn't help asking again.

"It's not just the rotation speed. If it comes to the surface facing away from it, maybe the four seasons and the direction of the pendulum's rotation are opposite to ours." Su Song laughed.

This is really something that only those who study astronomy can figure out, right? !However, Zhen Qiong felt excited when she heard it, and hurriedly said: "If you can write these into a thesis, it must be a masterpiece!"

Now he has called the articles published in "Theory of Creation" "papers".

Su Song laughed when he heard the words: "I'm afraid it's not the time yet. Someone must first see the clues before writing these things."

"It's been a few days. It won't be a year or so before no one gets enlightened?" Zhen Qiong was somewhat worried.There are so many stupid people in this world, but not all of them are as smart as Shen Kuo and Su Song.

Shen Kuo, who was silent for a long time, suddenly opened his mouth: "How can no one notice such a huge monster in front of you? I'm afraid that some people will see the clues, but they don't want to speak out..."

Seeing his expression, Su Song didn't know what Shen Kuo was thinking.They also found out about this, but tried their best to tell it through others.For this approach, Shen Kuo actually does not agree with it in his heart, and it is inevitable that he has some grudges.

Sighing softly, Su Song said: "There are countless people of insight in the world, so there is no need to worry about them. If no one really speaks, wouldn't there be us?"

Hearing this, Shen Kuo's complexion improved slightly, and he nodded slightly.

However, the worries of Zhen Qiong and Shen Kuo did not come true.After waiting for another two days, the person who spoke appeared and caused a whirlwind among the scholars.