Wen Huanzhang only circled in place, Zhang San looked at it almost, and continued: "So I just thought that the ground is an arc, not parallel?" Is it true that the co-workers crashed into the pillars? ”

Lao Wen's eyes lit up, and he felt that if he thought about it like this, some things would make sense. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Zhang San continued: "Later, I checked the history books and found that this is also wrong. ”

Wen Huanzhang asked anxiously when he heard this, "Why?" ”

Zhang San looked at Wen Huanzhang's anxious appearance, thinking in his heart that if he said that he stopped, then this old Wen would not die in a hurry, of course, this was not Zhang San's purpose, so Zhang San turned around and pointed to the west and said: "According to the history of the Tang Dynasty, there is Daqin in the west of the Great Food Country of the Western Regions, which is tens of thousands of miles away from the Tang Dynasty. ”

Zhang San said and pointed to his feet and said, Wen Huanzhang knows pi, although he hasn't calculated it, but if he thinks about it, he will indeed bend to his feet after the arc is so far.

Wen Huanzhang looked at Zhang San and felt that Zhang San must have something to say, Zhang San smiled and pointed to the east and said: "It has been thousands of miles from the capital to Dengzhou, and the east of Dengzhou is Goryeo, and there is Fusang Kingdom in the east of Goryeo, which is not less than ten thousand miles." ”

Wen Huanzhang nodded Indeed, it is indeed said in these books that Wen Huanzhang's brain is a little confused by Zhang San's words now, and he will put forward new theories at one time, and veto them by himself at the other. It's just that the problem that Zhang San said is indeed real.

Zhang San saw that Wen Huanzhang was already confused, of course he would not let it go, and then said: "And there is a sea to the east of Fusang, and it is said that there is a sea to the west of Great Qin, I don't know how wide, so I made a bold guess, will the land under my feet be a cylindrical shape?" ”

Wen Huanzhang was completely shocked by Zhang San's words, even if Wen Huanzhang thought that he had learned to be rich and five cars, he had never dared to think about such a question, Wen Huanzhang only felt that what Zhang San said was simply ridiculous. But no reason to refute it was found.

So Wen Huanzhang asked a classic question: "No, if it's a cylinder, wouldn't everyone under our feet fall down?" ”

Zhang San nodded with a smile and said, "Exactly!" I also struggled with this question a lot, and later I realized that I was wrong! It can't be a cylinder. ”

Wen Huanzhang finally smiled and nodded and stroked his beard, and then Zhang San looked at Wen Huanzhang and said, "Zhang found that this place is not a cylinder, but a ball!" ”

Wen Huanzhang's choked beard was almost pulled off, and he pointed at Zhang Sandao: "You! …… What do you say? Originally, Wen Huanzhang wanted to say that Zhang San was ridiculous, but considering that Zhang San's words must be corroborated, he didn't dare to draw conclusions easily for a while.

Zhang Sanxiao's eyes narrowed, and he continued: "Because I found that not only the east and west have arcs, but also the north and south of the earth also have arcs. ”

Wen Huanzhang listened to it and thought about it carefully, Wen Huanzhang only felt that Zhang San was saying something shocking, but he really couldn't refute it, and his scalp was itchy for a while, and he didn't know what to do.

Zhang San looked at the sky and said profoundly: "The Han has the North Sea of Su Wu Shepherd, and the north of the North Sea does not know how far, and the history of the Tang Dynasty contains the south of Qiongzhou and the three Buddhas of Zhancheng. Therefore, the non-sphere is not enough to describe the curvature of the earth. ”

Wen Huanzhang felt that Zhang San wanted to collapse his worldview, and he was also going to destroy his outlook on life based on his worldview, so he had to grab the last straw and said: "No, if it's a ball, the person under his feet, the water of the sea doesn't know where to go." ”

Zhang San nodded and said: "Exactly, in fact, Zhang is also thinking, if it is really a ball, why does the water on the earth not go to the sky, and the fruit on the tree does not fly to the sky." ”

Zhang San thought of Newton, as well as Copernicus, Galileo and others at this time, of course, not ashamed, but felt that these people would have to stand aside in the future. Zhang San continued: "Until one day, I read the book "Neijing", which said that everything in the world has yin and yang, and there are magnets that attract yin and yang. So I would venture to speculate that this place has an attraction that draws us in so that we don't drift around.

Wen Huanzhang shook his head and said: "As the old saying goes, the light clouds are the sky, and the turbid ones are the earth. That's true of everything. ”

Zhang San looked at Wen Huanzhang and smiled: "Exactly, I thought so at the beginning." ”

As soon as Wen Huanzhang heard that I thought the same way at the beginning, this sentence was a blow up of the scalp, Zhang San has said this sentence several times, isn't this right?

Zhang San continued: "Later, I thought, in this case, why does rain fall in the sky, and why does everything on the earth grow upward? Where does the rain come from? Are the trees of the earth free of turbidity? ”

Wen Huanzhang looked at Zhang Sanna and didn't know how to explain, not that he couldn't explain, but he felt that no matter how he explained, he would be caught, so he simply didn't answer to see what he said.

Zhang San thought about it and said: "So the sky is clear and the earth can't be trusted, so why does this land produce suction?" Could it be the gods? ”

Wen Huanzhang thought about it, there was also this possibility, but asking a Confucian to say the power of the gods was obviously against the words of Confucius. Wen Huanzhang didn't speak, and said secretly in his heart: "Could it be that this Zhang San is a cultivator? ”

Zhang San continued: "No, until one day I thought, could it be that everything in this world has the power to attract each other? ”

Wen Huanzhang felt that Zhang San was talking nonsense, and finally found that Zhang San had such an obvious loophole, how could he not catch it, and immediately said: "This is a big mistake!" If so, why don't you and I attract? ”

Zhang San smiled and looked at Wen Huanzhang and didn't speak, Wen Huanzhang looked at Zhang San and kept guarding against him and said again, I thought so at the beginning. It wasn't until Zhang San looked at Wen Huanzhang a little hairy that Zhang San said: "I can prove this!" ”

Wen Huanzhang didn't understand what Zhang San meant at first, but after listening to it, he looked at Zhang San suspiciously, Zhang San looked at him with a smile, and finally Wen Huanzhang couldn't resist his curiosity and asked, "How to prove it?" ”

Zhang San saw that the sun was about to set, and said with a smile: "Go back with me, Mr. Go, I can naturally prove it." ”

When the two returned to the living room, Zhang San immediately asked people to find a red rope, a bronze mirror, a long wooden stick, and two cloth bags. Everyone didn't know what Zhang San was going to do, but they did it one after another.

Zhang San thought for a while and felt that this was a good opportunity to educate the children, so he asked Yang Tai to call the children over and stand around the hall.

Zhang San first asked Li Si to climb the ladder and tie one end of the rope to the beam of the house, and the other end hung down. Then tie the wooden stick flat to the rope, tie a knot to fix the bronze mirror on the rope in the middle of the stick, light a candle and block it with something, only the side facing the copper mirror can reflect the light energy of the copper mirror to the wall and be clearly seen by everyone. Two cloth bags are hung at the ends of the sticks. After they are all tied, put eggs in one of the two cloth bags and the other in the same weight of rice.

Then, while waiting for the stick and rope not to move, Zhang San explained the principle of this experiment, especially the children, it may be difficult to explain to them the gravitational force, but as long as there is this experiment, they will never forget this concept for the rest of their lives. Anyway, Zhang San himself had only seen it once in class in the house, and he remembered it deeply.