On the day of Humu, Wang Haoran did not go to read the papers, and when he was chatting with Wang Qihong in the study, someone came in and reported that someone outside the door asked to see the little master, claiming to be Li Chunfeng, the general of the Taishi Bureau. Pen Fun Pavilion www.biquge.info Li Chunfeng is also a big celebrity in later generations, Wang Haoran has seen it before, but he has never said hello. Wang Haoran didn't know why Li Chunfeng suddenly came to find him, and he didn't think much about it, so he asked his subordinates to lead him to the hall.

"Li Chunfeng, the general of the Xiaguan Taishi Bureau, has seen Wang Yuma." In the hall, Li Chunfeng introduced himself again.

"I've heard the name of Li Shilang for a long time, come, sit down and talk again." Wang Haoran said politely.

"I don't know what happened to Li Shilang's visit today?" After some politeness, Wang Haoran asked.

"The day before yesterday, Xia Guan heard a friend of the Hanlin Academy talk about what Wang Yuma said about the circle of the earth, and Xia Guan also felt that this was not impossible. I heard that Wang Juma had a way to prove this, and the lower officials liked astronomy, so they came to ask for advice. ”

Wang Haoran still has some understanding of Li Chunfeng, astronomy and arithmetic attainments can be said to be second to none in the Tang Dynasty, and it is very suitable for him to study the earth circle, not to mention that Li Chunfeng is deeply valued by Li Shimin, and he has a way to persuade Li Shimin to fund his research, but don't underestimate this research, once the earth circle theory is determined, other related theories have to be re-verified, and a series of studies need to spend a lot of manpower and financial resources. The use of free fall to prove that the earth is rotating is only the beginning, the armillary theory has said that the big one is close to a hemisphere, many phenomena can be explained on the basis of the theory of the sky, if you want to prove that the earth is spherical, you have to use the sun, moon and stars and so on to corroborate.

"I didn't dare to give advice, I just discovered such a phenomenon, that is, an object falling from a high place, it will not fall vertically, but will always be some distance from the point difference perpendicular to the earth."

"And this? Does the king think it's because the earth is turning? Li Chunfeng said curiously.

"That's right, I did an experiment where I built a small pool on the ground, and when the water calmed down, I put a small branch in the middle of the pool and floated on it, and then covered it with a glass lid to prevent it from being blown by the wind. It stands to reason that if the water does not move, the twigs will not move, but when you look at it again the next day, the twigs will obviously move, and if the earth is always turning, then this phenomenon is easy to understand. To be honest, although Wang Haoran knows that the earth is spherical, if it comes to the verification process, he does not think that he can be better than the astronomer and mathematician Li Chunfeng, so in this matter, Wang Haoran knows everything about Li Chunfeng.

Li Chunfeng discussed with Wang Haoran for a long time, and said more and more in his heart, and after some thought, he asked: "Wang Fuma, the lower official wants to ask His Majesty for permission to study the theory of the earth and the circle, but this matter involves a lot, and there will be many problems one after another, and even the calendar will change with it, such a big project, the lower official is worried that His Majesty is unwilling to do this, so can Wang Fuma face the saint with the lower officials and explain the benefits and disadvantages to His Majesty?" ”

Wang Haoran agreed without much thought, because in terms of current needs, the theory of covering the sky is enough, in ancient times, it was not comparable to later generations, and later generations had a lot of money and energy to invest in black holes, four-dimensional and other research, but Datang did not, for them, what if the earth is round or square? I can't see what benefits Diyuan can bring at all, so whether Li Chunfeng can get what he wants depends on Li Shimin's mood. Wang Haoran agreed with the idea of fooling Li Shimin, he didn't know what the use of studying the Earth Yuan Theory could be now, and he didn't plan to build a rocket satellite or anything, and the reason why he hoped that Li Chunfeng could verify the Earth Yuan Theory was entirely because he felt that if the descendants of Yan and Huang could confirm this earlier, future generations would be able to sneer in front of foreigners. It's child's play, isn't it? In fact, for any country, national pride is quite important, how important is it? Let's say the national sport of later generations, everyone should know that their country's national sport is table tennis, not football, why is this? Table tennis originated in England, but football originated in Keju, so why is the national game table tennis and not football? The reason is very simple, just because the Chinese play table tennis well, it will be very embarrassing to define football as a national sport, so how can you mention any national pride? Wang Haoran's predecessor Wang Ye is a wonder in later generations, he thinks that no matter how high-grade Chinese football is, it is also something that originated from his ancestors, and if it doesn't work, he will be rejected, so what's the difference between it and temporary workers?

Because of some grief and indignation in later generations, if possible, he can leave something that can make future generations tremble, no matter whether it is useful or not at the moment, Wang Haoran is still happy to do it.

"Attract the past! Ha ha...... That's a bit interesting! In the palace, after listening to Wang Haoran's theory, Li Shimin lifted a book and then let go, watching the book fall on the table, feeling that looking at the things he was accustomed to from a new perspective was different.

Wang Haoran was prepared to persuade Li Shimin this time, he still didn't know what Li Shimin meant, while Li Shimin had not made a clear statement, Wang Haoran decided to continue to provoke Li Shimin's curiosity, and said: "Your Majesty, there are many things in this world that are not actually as the world sees or feels. For example, the bamboo leaves on the vase, many people must think that they are green, right? In some people's eyes, however, it is yellow. ”

"What the king said is a disease of contempt?" Li Chunfeng asked, staring means color blindness.

"Yes, but who's to say for sure whether it's the yellow people who have the disease of ignorance or the people who think it's the green people who have the disease of ignorance? Or is it that everyone has a disease of blindness, but it's a different color? ”

Li Shimin was a little confused by Wang Haoran's logic, so ...... So what color should bamboo leaves be?

Wang Haoran didn't care about Li Shimin's questions, he opened a wooden box that had been prepared before, there was a white note in the box that was vertically tiled, and a light gray note was inlaid in the middle of the note to divide the white paper into two pieces, Wang Haoran held the wooden box and asked Li Shimin: "Your Majesty, look at this, do you think the color of the upper and lower places is the same?" ”

Li Shimin looked at it, and asked Wang Haoran to get closer and observe it carefully before replying: "It's obviously different, and the bottom is grayer." ”

Wang Haoran didn't rush to reveal it, and asked Li Chunfeng and Fu'an to see what the difference was between the two, and they all said the same thing as Li Shimin.

"Actually, the color is the same in these two places!" Wang Haoran smiled at this time, and slowly removed the gray note as he spoke.

"This ...... It's just the same piece of paper at the top and bottom ends! Fu'an was surprised, he saw Li Shimin and Li Chunfeng all showing surprise, and his curiosity rose for a while, and he walked in front of Wang Haoran and took the gray note, put it back in place for a while, and uncover it again for a while, but whenever he put the gray note back in place, the upper and lower ends of the white note will become different colors, and when he takes away the gray, it becomes the same again, "This is amazing!" Master Wang, what the hell is going on? ”