Li Jinglong didn't go, and Zhu Su's study was designated as a forbidden place for the Zhu family since Zhu Biaozhen took away all the manuscripts last time. Xiang Deng, who was temporarily the head of the Huangzhuang, hurriedly ran out, and soon brought a small glass vessel.

"Isn't this just a fragment...... What does that mean?" The crowd was puzzled.

Zhu Su didn't answer. Took the little thing the size of a finger. This is a part of the Qianyuan glazed ware he found in the palace treasure, this glazed ware is not of the highest grade, and the color is extremely impure. But there is one section, which is very close to transparent crystal color.

So Zhu Su broke this ornament, leaving a piece that was close to transparent, and grinded it into a prism to tease his sister Princess Huaiqing in the palace.

This time it just happened to be used to scare these scientific idiots.

"Fang Xizhi." Zhu Su walked to Fang Xiaoru's side. "Stretch out your hand."

Fang Xiaoru didn't understand what he meant, walked two steps to Zhu Su's side, and stretched out his hand to put it in the sun. Zhu Su took out the prism and fiddled with it slightly, and suddenly, a rainbow appeared in Fang Xiaoru's palm.

"Ahh Fang Xiaoru was startled, his hand shrank and wanted to take a closer look, but the rainbow actually fell to the ground. He was shocked and wanted to squat down to build the rainbow, Zhu Su gently flicked the prism, and the direction of the rainbow changed, shining on him.

"Now that this rainbow is on you, do you feel that the yin qi is overwhelming?" Zhu Su smiled.

Fang Xiaoru Muran shook his head, only to feel inexplicably shocked. The rainbow was really plucked by this highness? Is the statement of the sages really wrong?

"You...... Are you really qualified for the rainbow?" Xu Yungong was also shocked inexplicably. In his heart, Zhu Su is already a genius in arithmetic, and even his sister, who has always been respected, is also very respectful of Zhu Su's attainments in arithmetic. At Zhu Zhang's wedding that day, he recited Zhu Su's problem-solving ideas, and his sister studied with him for several days and nights, and the more he studied, the more he felt that it was broad and profound.

In just a few lines, the attainments have surpassed the sages of arithmetic several times!

Being proficient in arithmetic at this level is already an achievement that ordinary people can hardly achieve in a lifetime. As a result, he actually has attainments in Gewu?

Take off the rainbow in the sky, this is like a mythical god!

Fang Xiaoru, Xu Yungong, and even Li Jinglong and Zhu Shouqian were all shocked. Fortunately, the soldiers had already finished their lunch and marched back to the camp, and only a few of them were left in the canteen. Otherwise, it must cause a sensation.

"This ...... Is this also learning?" Fang Xiaoru looked up at Zhu Su. Is this really learning, not immortality?

"You despise this knowledge?" Zhu Su thought that Fang Xiaoru was questioning the uselessness of this knowledge, so he snorted arrogantly. "It's not a science, it's called 'optics,' The so-called rainbow is actually just the same as the sunlight that can be seen everywhere......

"A rainbow is sunshine?" Li Jinglong's face was full of disbelief. "Fifth uncle, don't lie to me. Sunlight is just one color, but rainbows have many colors, and you can see with your eyes that they are not the same thing......

"This is the joke caused by not practicing optics." Zhu Su said with a smile. "You need to know that sunlight actually contains seven colors."

….

"With a rough optical penetration, it is easy to extract these seven colors from the sunlight."

As he spoke, he fiddled with the prism in his hand. Several people leaned their heads to look closer, and found that as long as the sunlight passed through the prism, it naturally turned into a rainbow!

"What's the reason? What's the point?" Fang Xiaoru only felt that his heart was itching, and his eyes looked at Zhu Su like a young woman for decades.

Zhu Su deliberately ignored him, but looked at Li Jinglong and said with a smile, "Jiujiang, I will pass on this knowledge to you when I go back."

"If you are proficient in optics, you can also see thousands of miles, cut ice and make fire, and all kinds of wonderful uses. What is the rainbow at your fingertips? It's just the lowest means."

"Foresight, cutting ice for fire?" Xu Yungong was shocked, that was really a god's means! Li Jinglong was even more overjoyed, "That dare is good! I didn't expect you to be such a fairy method, Fifth Uncle! My nephew will definitely study hard!"

Even Zhu Shouqian pursed his lips, and his heart was extremely moved.

"Your Highness! Filial piety is cheeky, can you solve the confusion of filial piety?" Fang Xiaoru was already extremely curious, but now that he has heard of such a knowledge that he has never heard of, how can he not be itchy? grabbed Zhu Su and wanted to kowtow to him.

"Don't ask about poetry?" Zhu Su laughed. Fang Xiaoru's face flushed, of course he knew that compared to the practical abilities of foresight and cutting ice and fire, mere poetry was insignificant. Just talking about the point of foresight, if it is placed in the battle array, can not only take the lead one step ahead of the enemy, but also reduce how many scout casualties?

Of course, he can't be taught by him as soon as he asks, and he needs to be completely convinced, so that he can use his filial piety to call for his "Gewuxue". Zhu Su didn't forget Lao Zhu's entrustment to him to open a sect, how could such a good chess piece sent to the door be let go? So Zhu Su continued to pretend to be Boyi and said, "One of the optics, but one of the ears."

"My knowledge of things is incomparably profound. Everything in the world is all-encompassing and all-encompassing. Physics, chemistry, mathematics, medicine, etc., all exist to explore the avenue of heaven and earth."

"It is intended to be the principle of all things in heaven and earth, and to be used by all our peoples. If Confucianism was born to govern the country and level the world, then I want to take all things in the world and use them for human use!"

Fang Xiaoru was suppressed again. The study of things? This young Fifth Highness is not just a side school, but a complete school?

Gewuxue ...... Is this the name of this new school?

Fang Xiaoru felt as if his whole body was about to burn.

Zhu Su, who had appeared in front of people, felt a little tired. I just finished running laps in the morning, and I was easily sleepy after eating. Although Li Wenzhong took care of him and had other important things to do, he had to control the time after lunch by himself, but after all, the time was still too little, and he even had to race against time to rest. He waved his hand and stopped Fang Xiaoru and Xu Yungong, who wanted to ask the question: "The way of learning things is broad and profound, and only smart people can understand it. I don't want to talk about it, so let's answer a little introductory question first."

"Hmm...... You can try making a kettle out of paper, filling it with water and then burning it with fire. What will happen, why, think of it and tell me."

"What can happen to burning paper on fire but burning it?" Xu Yungong said assumedly. "Could it be that when it burns out, the water will extinguish the fire?" Fang Xiaoru also added.

"Definitely. In this way, the fire will not burn through the paper, and the water in the paper will be successfully boiled by the fire."

"How is that possible! There is a thing that paper can't be burned! No way!" Xu Yungong felt that Zhu Su was bragging!

"Little grandpa, you can try it yourself." Zhu Su yawned. "Now that you've answered that question, ask me something else. I'm sleepy, Jiujiang, Tiezhu, let's go back to the village to wash and rest."

"When you've figured out this most basic question, come back to me." With that, he left the cafeteria.

Ignition pine cones