In the original history, Fang Yizhi did not complete the first draft of "Physics Knowledge" until the sixteenth year of Chongzhen. However, this physics of his is not the physics of the afterlife, but refers to the principle of everything in the world. It includes astronomy, geography, physics, chemistry, biology, medicine, agriculture, technology, philosophy, art and many other aspects.

The word physics in later generations was actually transmitted to the Wa Kingdom by "Physics Knowledge", and then the scholars of the Wa Kingdom translated Physics as physics and transmitted it back to China.

If Fang Yizhi wasn't really knowledgeable, he wouldn't have been able to write this book. Now that I have started to write, of course I have confidence in this part. Huang Zongxi happened to come to visit and ask for advice, and it was the itch that scratched him.

After a while, the two of them arrived at the study, the guest and the host sat down, and the servant stepped back after serving a good tea.

Before Huang Zongxi could speak, Fang Yizhi asked a little eagerly: "I don't know what kind of problem it is that stumped Taichong, why don't you talk about it and discuss it together?" ”

Although he said so, in his heart, he was ready to give Huang Zongxi a detailed answer, and it was best to say that Huang Zongxi was convinced, and this sense of accomplishment was the most refreshing!

But who knows, Huang Zongxi did not immediately ask his problem, but asked Fang Yizhi another question: "Ask Mizhi, you said that this thing fell to the ground, why didn't it fall to the sky?" ”

"......" Fang Yizhi never expected that Huang Zongxi would ask such a question, and he was immediately stupid: What is this problem? Is this also a problem?

Seeing Fang Yizhi's appearance, it was obviously not unexpected by Huang Zongxi, so he didn't wait for Fang Yizhi to respond, and then asked: "A folding fan, a book, if it falls at the same time, which thing will fall to the ground first......

In the study, there was only Huang Zongxi's voice, he asked all the questions that Zhang Mingwei asked yesterday, and finally naturally came to that unbelievable conclusion.

At this time, Fang Yizhi was already completely stupid, which was too unexpected for him.

At this time, he didn't study these at all. It can be seen from his "Little Knowledge of Physics" that he mainly has understanding in the following aspects.

In astronomy, it is the theory of the circle of the earth, and even the correct guess of the orbit of Venus and Mercury around the sun has been proposed.

In terms of physics, he put forward the simple theory of light fluctuations, which later generations called the "air-light wave theory", and on this basis, he explained his proposition of "light fat shadow thin" and so on.

In terms of medicine, it is mainly the discussion of the integration of traditional Chinese medicine and Western medicine, so that Chinese medicine can learn from each other's strengths.

In addition, his book also introduces the knowledge that belongs to the science of life, such as "washing gluten method", "removing clothes and greasy method", "collecting books and removing beetles", etc., these items add a lot of practical value to the book as "essential for home".

But no matter what he was, he was really shocked by the questions asked by Huang Zongxi: this invisible and untouchable air is actually similar to water, which is really amazing!

I have to say that Fang Yizhi has no interest in science than others. Therefore, after listening, he was immediately overjoyed, stood up, strode up to Huang Zongxi, and said with emotion: "Brother Taichong, this is here to ask questions, but to preach and receive karma to solve doubts!" Today's words are really heard of in the morning, and you can die at night! ”

At this time, Fang Yizhi felt that another door to cognition had been opened, which made him feel ecstatic.

However, Huang Zongxi listened, but he didn't have a little pride, he still had that sad expression, and the other party said with wisdom: "The secret is misunderstood, I really came to ask for advice today." Look at me like this, I'm really not broken? ”

"Ah......" Fang Yizhi couldn't help but be surprised when he heard it. Looking at Huang Zongxi, it really didn't look like he was telling a lie, so he immediately asked curiously: "What problem did Brother Taichong come up with, and he couldn't solve it by himself?" ”

"Alas, I didn't come up with it myself!" Huang Zongxi listened, sighed and said, "I originally wanted to get the approval of my teacher, so I went to learn from my teacher, but I was given such a problem first. If you can't answer it, it's all over! ”

"Oh?" When Fang Yizhi heard this, he couldn't help but be even more interested, and hurriedly asked, "What kind of problem, let's hear about it?" ”

When he said this, he no longer had the confidence he had before, and his tone was a little weaker.

"Mr. explained, saying that I should go and see the boiling water in the kettle to see if I can realize any truth, and then I will have the qualification to learn the Tao!" When Huang Zongxi said this, he sighed and said, "From yesterday to today, I haven't blinked, but I can't see any reason!" ”

Fang Yizhi was surprised to hear this, he really never cared about this. So he immediately sent a servant and told him to boil water in a pot in front of the two of them.

The servant couldn't understand how bored the two masters were, but since he had been ordered, he began to boil water on the spot in the study.

Then, Huang Zongxi and Fang Yizhi were all staring intently.

As a result, after a long time, the water in the pot was going to boil dry. Because of the previous series of questions, this made them have a rough idea of what level of truth they have realized. Therefore, in the end, Fang Yizhi and Huang Zongxi looked at each other, and they really couldn't understand any reason.

Huang Zongxi couldn't get an answer from Fang Yizhi, so he couldn't help but be very depressed and said: "I have seen that the water in the pot has been boiled to the point that there is not a drop left, and even the pot has been burned red, and I have no special experience." Looks like I'm still too stupid! ”

Hearing him say this, Fang Yizhi suddenly had a flash of inspiration, suddenly clapped his hands, and said excitedly to Huang Zongxi: "Ah, Brother Taichong, there is, I thought of it!" ”

"Huh?" Huang Zongxi was a little surprised when he heard this, and couldn't help but hurriedly ask, "What did you think of?" ”

"Brother Taichong, please see!" Fang Yizhi excitedly pointed to the kettle and said, "Is the water in here gone?" This means that all the original water has gone into the air. So it is certain that the buoyancy in the air actually comes from the water! You say, isn't that the truth? ”

Huang Zongxi listened, thought seriously for a while, and said with some uncertainty: "However, if this buoyancy comes from water, why is it different?" I'm afraid this is not what the gentleman wants me to realize! ”

Fang Yizhi listened, his excitement cooled down a little, and after thinking about it again, he asked Huang Zongxi: "Then what does Brother Taichong think?" ”

If Huang Zongxi wanted to be able to answer, he wouldn't have come to Fang Yizhi to ask.

Seeing him like this, Fang Yizhi waved his hand and said, "We don't have to guess, just go to the Metropolitan Procuratorate and ask the order, don't you know if it's right?" ”

"......" Huang Zongxi was stunned for a moment when he heard this, and then he understood, so he said with a wry smile, "The teacher is so troubled by the affairs in the court, how can he pay attention to us." Besides, the one who came up with this question is not a teacher! ”

"Didn't you say that Mr. got the problem?" When Fang Yizhi heard this, he asked in surprise, "If it's not your teacher, who else would it be?" In this Beijing Division, there seems to be no one with this level? ”

Huang Zongxi listened to it and said seriously: "How could it not be, the new commander of the Jinyi Guard, Xingguo Gong is the one who came up with this problem!" ”