That optical experiment was conducted on the third day of lectures, and Cheng Zhiyuan also left a proverb that was widely circulated in Qi State.

"In the blink of an eye, the light pricks you before."

This comes from Cheng Zhiyuan's first sentence about optical model at that time, "I just cut off everyone's heads with the speed of light."

This sentence became popular in Qi after the third lecture, mainly because of the interesting and various phenomena brought by optical models. In fact, Mo Zhai finally came to the new school palace, partly because of Cheng Zhiyuan's optical model.

reason.

Optical models were first studied by Mozi, but because of the theory that Mohism benefited the world and died, it conflicted with many schools. Moreover, in recent years, the rise of various philosophers has become increasingly "not Yang Jimo". From the Mohism three

After the division, the Mo Sect is just a nominal huge holy gate, and its inner body is just an empty shell.

Compared to the eight Confucian genus separated from each other but each had huge forces, in the Warring States Period, fewer and fewer Mo were willing to sacrifice themselves for the world. In the south, Juzi Meng Sheng made desperate decisions, which led to the south.

After Zhimo almost wiped out his entire army in the battle to defend the city, the voice of the Mo family became weaker and weaker.

The countries need the Mohist school, but what they need is no longer the Mohist school’s meaning, but the Mohist school’s “mechanics”.

They don’t need to know how to fire crossbow arrows, they just need to know how to make this thing.

If you know how to make it, just use energy to produce it. With the mass-produced weapons made by the Mohist family, you can quickly invest in a brand new war.

As for magic tools, because they must be injected with energy and spirit, they will not be happy by the nations, and the cost of making is too high. Otherwise, if there are treasures like wooden copper bells, then first accept the various schools of thought.

The country should have been unified.

This is also the reason why the Western Mo was severely criticized by the two factions of the East and the South. It believes that the Western Mo helped the evil and not only created a murderous machine, but also betrayed Mo Zi's righteousness. What is the difference between this and Shengchuo!

Therefore, the Western Suzi's belly did not live long after Meng Sheng's death, and he died with regret.

He always remembered what Meng Sheng said before his death, and those words had spread to the world.

[If you don’t die, since now, those who seek strict teachers will not be as good as ink, those who seek virtuous friends will not be as good as ink, and those who seek good ministers will not be as good as ink. If you die, the reason why those who perform ink will continue their careers.

】

Mo is not a person who benefits the world, but is used to "prepare for the world's urgent needs".

Yang, Zhu, Modi, who had been galloping around the world in the past, finally reached the end of glory. After the sun was declining, Confucianism, which had been self-contact and did not conflict with the outside world, suddenly woke up. Only then did it realize that Confucianism had already stood at the third level.

Top location for the door.

After the Yang Zhu School retired, the Legalists came from behind and were called Sanshumen together with Confucianism and Mohism.

Zhongni also inherited the title of Supreme Saint of Duke Yin of Lu, but this was just a crown given to him by the nations. Even if Zhongni was really strong and very strong, his principles were still not recognized by the world.

The Warring States Period needed Confucianism, and they needed the size of Confucianism, but they did not need Confucianism.

"I'm not here to promote the Mohist doctrine."

Cheng Zhiyuan first made a point of explanation: "The Mohism and the Confucianism have always been incompatible with water and fire, but I have to say one thing that the Mohism is not wrong."

"The meaning of Confucianism is not wrong. The Mohist was born into the Confucians and finally returned to the world, where they came from and where they returned. The original principle of this optical model was also made by Mozi. I picked up people's wisdom, but it was just improved.

Some."

Cheng Zhiyuan began to talk about optical phenomena, and at the same time, it started with refraction.

The core of the two children's debate is actually not astronomy, but an attitude of reflecting wisdom and treating knowledge. Zhongni said that he didn't know, so he didn't know. He was very honest. He knew what he knew, and didn't know what he didn't know. It was also knowledge.

;The concept proposed by the two children seems absurd, but in fact, it can stump Zhongni for a moment. This reflects that learning is endless and knowledge is not all in bamboo slips, it is the corresponding one.

What the words of Master Nanhua and Mr. Dongguo.

Mr. Dongguo asked the True Lord Nanhua where the Tao was.

The True Lord of Nanhua answered three times in total. The first time he said it was in an ant nest, the second time he said it was between tiles and gravels, and the third time he said it was in the cessation pit and urine. Mr. Dongguo asked why he became more and more humble. Nanhua

The True Lord replied that "Tao" is in the most humble place.

But the great Confucian gentlemen all understand and understand these principles, and Cheng Zhiyuan doesn't need to teach them another lesson from the traditional perspective.

Therefore, Cheng Zhiyuan took out the optical model, drew the ground with a sword, and began to tell you another aspect of the two children's debate.

Among all the saints, what Zixia said makes the most sense.

"I will first explain it with the theory of the heavens..."

Gai Tian said it was simple and crude, just like the sky was round and the place was. Cheng Zhiyuan didn’t know whether this world was a star, but at least there was one thing. There was a Gai Tian theory, a Hun Tian theory, and even...

Cheng Zhiyuan was still in the back mountain of Jixia and found Xuan Ye and said.

Gai Tian and Hun Tian originated in the Spring and Autumn Period, and Xuan Ye originated in the middle and late Warring States Period. When Cheng Zhiyuan read this book, he could not help but think of Xunzi.

In the late Warring States period, only Xunzi could do the work of writing such a masterpiece as Xuan Ye in the entire society at that time, because although everything Xuan Ye said was quoted from "Zhuangzi", in fact, if you look closely, you will find that you can take a closer look.

It was discovered that the principles in it were in line with Xunzi's "Theory of Heaven"!

However, after the Qin and Han dynasties, no one preached again. Dong Zhongshu mentioned Huntian again. Later, Gai Tian said that he was rekindled. Every dynasty wanted to counterattack Huntian faction, but it failed until the Qing Dynasty...it was successful.

Huntian theory is actually another kind of geocentric theory, but the difference is that the geocentric theory believes that the earth is at the center of the universe and is still, but Huntian theory believes that the sky is wrapped outside the earth, and the heaven and earth are like chickens hanging on the ball

The middle rotates slowly, and the earth body becomes the heart of the earth.

The Huntian theory is better than the geocentric theory, but worse than the heliocentric theory.

Cheng Zhiyuan talked about the sky, and some Confucians agreed: "The sky is as round as a roof, the place is like a chess game, the sky is not enough to the northwest, and the earth is not as satisfied as the southeast."

Cheng Zhiyuan said: "Zeng Zi Zeng said, the way of heaven is round and the way of earth is square?"

Zeng Shen said: "The square and roundness of heaven and earth are the two paths of heaven and earth. The round sky cannot cover the four corners of the square earth. I refuted that man back then that sky is not enough to see the true nature of heaven and earth."

Within the Zisi School, such as Zixun, his expression moved slightly.

Even within the same school, there are differences in their views on different things.

Cheng Zhiyuan: "When the sky is covered, the sun rises from the east pole, comes out from Tanggu, and rises from the big peach trees in the East Sea; when the sky is covered, the sun sets from the west pole, falls from Yuyuan, and sleeps peacefully under the big sycamore tree in the west, if so

In this way, then...it's just like this..."

Cheng Zhiyuan drew a picture, the sun's light appeared from the east and then began to chase, which was accompanied by the beam of light imaging from the small hole.

"When the heaven and earth turn from night to day, the first ray of light between heaven and earth should only shine in the east."

Cheng Zhiyuan said: "However, the people of the West, the transformed beings, the Queen Mother of the West, the Yellow Emperor Palace, and the nine fields all arrived, and they could still see the sun at the end of the east. So where did this beam of light come from?"

Zi Xun: "The light shines in the world like a candle dragon opening its eyes, coming in an instant, just shining on all directions."

Cheng Zhiyuan: "Mr. Zixun, if you have heard of the optical model I made in Jixia Academy, you should know that I have used that optical model to make the conclusion that light has speed."

"The light of heaven and earth will never shine on all directions in an instant. If you walk to the West Pole and keep walking, you will always reach the end of the earth, regardless of whether there are people there or not."

There is probably no Europe in this world, but similarly, the East has the Emperor of Mountains and Seas in the East, and the West has the illusion of the Western Pole, which may be said to be an area connected by the two worlds.

"There is a moment of the east sky, and the end of the west will never be visible."

Zi Xun laughed: "The end of the West beyond the Western Pole? Not to mention whether there is this absurd place, even if there is one, you have not been there, how can you provide evidence?"

Cheng Zhiyuan: "I assume that there is another side of this world, and the earth continues to extend... The speed of light is... At this speed, combined with the distance extending from the earth, then in the first moment, with the present

According to the calculation of 'li', it is about 450,000 to 500,000 miles away. Mr. Zixun, you can see the strange scenery of the world still dark, but everything is already clear."

Zixun thought for a while and said seriously: "You have no evidence and cannot prove it."

Even the original earth had a diameter of only more than 20,000 miles. Even if the world was ten times larger than the earth, it was only more than 200,000 miles.

In an instant, five hundred thousand miles...that was a place that even the saints could not reach. Maybe Bai Yujing was there.

Cheng Zhiyuan: "Many people cannot prove it, but the model can. This is one of the reasons why I want to make an optical model and repeat Mozi's previous experiments."

"From Gaitian's world, that's it."

"The questions raised by Huizi are called sophistry by the world, but I call them paradox, and the jade chain is also solved by me. Although the method was solved by me with the help of my predecessors and the principles of the sages, it is not considered

My contribution alone.”

Zi Xun laughed: "I heard from Jixia that Cheng Zi often said that he was taught by the sages, but we have never seen such sages before..."

Cheng Zhiyuan: "I can learn Fuxi Lianshan, but Mr. Zixun may not be able to learn it!"

After this sentence fell, Zi Xun suddenly became silent. This sentence was really true. Even Xunzi couldn't solve Lianshan in the world, but Cheng Zhiyuan could directly see the algorithms in it. Some things were specific left to specific people.

knowledge.

"Let's go back to the essence of the two children's debate."

Cheng Zhiyuan said: "As Gai Tian said, then the bright night between heaven and earth does not come at the same time. The sky is dark, the world is already bright, the sky is bright, the world is already dark, isn't it a joke?"

"When the sky is covered, if two children are at a point of 500,000 miles, then they will step forward and will be closer to the sun, and will be far away from the sun."

The saints were stunned for a moment, feeling something was wrong, but they couldn't say it.

"Is it sophistry? No, this is the day when two children are under the sky."

Cheng Zhiyuan said: "The next one is Huntian."

"When it comes to Huntian, the principle of Gaitian is not suitable."

When the sun is in the sky, you can draw perihelion and arihelion. If in the macro sense, then when the sun rotates in the sky, it moves around the suspended sphere world. Then, at the beginning of the sun, the sun moves to perihelion, at noon.

Running to the astral point... Of course, this is not the case in fact, but Huntian? Cheng Zhiyuan compressed time to a limit, which is obvious.

Of course, when we arrived in Huntian, we must mention the "qi" that Chen Liang and Zixia mentioned.
To be continued...