Li Shimin rested for a while in the villa left by Xia Hongsheng, and then came down with the others, left the living area, and went to another place. Pen "Fun" Pavilion www.biquge.info

When everyone got there, they saw that there were many workshops built there, so they asked, "Xia Qing, why are there so many workshops in this academy?" ”

Xia Hongsheng replied: "These workshops are for students to do experiments. Some experiments are dangerous and must be carried out under the guidance of Mr. Moreover, many experiments require many tools, and it is not convenient to do them in the classroom. Therefore, the tools are all in the workshop, and when the students do experiments, the husband will lead them to do it. ”

As he was talking, he saw a group of students coming over in a group, and the leader was the music platform, and it was a little surprising to see so many people standing like this. When he got closer and saw clearly, his face suddenly changed, and he immediately strode over.

"Mr. Le doesn't need to be polite, don't disturb the students." Li Shimin dared to say to him before he was about to salute at the music stage: "Today is just to see the experimental class taught by Mr. Le, and Mr. Le is also invited to do his own thing." ”

"This ...... Be! The bandstand nodded, and returned to the students. All the students looked this way curiously, Xia Hongsheng's eyes were sharp, and he immediately saw that when everyone was looking this way curiously, only the two of them shrank back vigorously.

Xia Hongsheng grinned, those two people were Li Ke and Li Tai.

Li Tai is talented, and he has studied with Xia Hong a lot of foundations, so although he is young, he is actually better than other students.

As for Li Ke, although he is not bad, he is slightly inferior to Li Tai after all, mainly because he has not studied with Xia Hongsheng before him, and Li Tai has the foundation laid by Xia Hongsheng.

"Listen attentively, don't be distracted!" Seeing that the students were all looking over there, Letai said a word, and then turned and entered one of the workshops.

All the students also went in, and the layout was different from that of the classroom, with a large rectangular table for the two of them, which served as a laboratory table.

There was also a lectern and a blackboard on top, but the lectern was a laboratory bench just like the one below.

The stage went up, and everyone followed, standing at the back.

"Earlier we talked about light, and the textbook says that light travels in a straight line on the same homogeneous medium. The so-called medium, as we said, is that light travels through something, and this kind of thing is called a medium. The sunlight we see during the day, the light of the kerosene lamp that shines at night, these are all lights, and they all travel in a straight line. Today, in order to prove this principle, let's do an experiment on small hole imaging in the textbook. After the music platform went up, he said to the students: "The shadow arrives, there is an end at noon, and the shadow is long." Say it on the end. Shadow. The man of light is as bright as he shines, and the man who is below is also high; The one who is higher also goes down. The foot shades the light, so it becomes a shadow on the top; The first shade is glazed, so the shadow is below. There is an end in the near and far, and Yu Guang, so the photo library is also. To put it simply, when the light passes through the object and passes through the hole, due to the straight line propagation of the light, the upper part of the object is imaged below, and the lower part of the object is imaged above, and a reflection will appear. Let's use a model to show this process. ”

With that, the musician picked up a piece of cardboard, with a round hole in the middle, took out a cylinder and put it in front, and then took out two paper-cut arrows, on which was written a light word.

"Let's say this cylinder is the light source, then let's only look at the light that can pass through the hole, because the other lights ...... How's it going? Letai asked suddenly.

"The rest of the light was blocked by the cardboard around the holes." Li Tai raised his hand and stood up, and replied, "This allows us to focus on observing the light that needs to penetrate the hole." Observe what the light looks like after passing through the hole. ”

Letai nodded: "Yes, very good." ”

Li Shimin touched his beard and looked at his son, and the smile on his face couldn't be broken.

Xia Hongsheng couldn't help but despise Li Tai, this product was also deliberately behaving in front of his father, it would be good to see Li Tai snort in class, let alone take the initiative to answer questions.

"Xiaokong Imaging ......" Li Shimin lowered his voice and said, "This is the experiment that Xia Qing did in front of the music stage and others in the palace before. ”

Xia Hongsheng nodded: "It's this experiment." ”

Regarding the figure on the wall, Xia Hongsheng has not asked since then, don't ask what you shouldn't ask, if you ask, it's trouble. It's just that I heard later that I killed a few servants because of this incident, and it was the remnants of Li Jiancheng in the palace, and then there was no follow-up.

"This ......" Li Shimin frowned and said, "This method was a disaster in the palace before, why did Xia Qing teach these students?" ”

Xia Hongsheng shook his head with a smile and asked, "Your Majesty, why did everyone else be terrified when a ghost appeared in the palace at the beginning, but Weichen was not afraid?" Your Majesty thinks, why did the courtiers worry that the lightning struck the palace at that time, and the courtiers were worried that it was a warning from the heavens, but only the ministers did not take the thunder in their eyes? It is precisely because Weichen understands the truth. Your Majesty, think about it, everyone in the palace knows the truth of the image of small holes, so the shadow that appeared on the wall at the beginning was just a trivial matter. If everyone knew the knowledge of thunder and lightning, then no one would think that a thunderbolt and lightning would be an irrelevant thing like the emperor's immorality. ”

Li Shimin looked at Xia Hongsheng, but listened to Xia Hongsheng continue: "It is precisely because people know too little things, so they will see some things that are actually very common, and they will be puzzled, and then they will be deceived, bewitched, and do wrong things." Weichen gave an inappropriate example, in ancient times, Chen Sheng and Wu Guang rebelled, and let people pretend to be foxes in the grass, and then said that this was a prophecy from heaven, and they wanted him to be king, and those people all believed it. How foolish! It's because they have so little knowledge! Let's take the original Weichen burning locusts as an example. Weichen knows the truth, it is very simple to do, but in the eyes of others, it is a miraculous skill, and Yu Ji has bewitched many believers with this thing, and there are still people in the gate who worship what kind of red lotus fairy. If everyone else has this knowledge, how can they be bewitched by Yuhime? This is the importance of enlightening the people! Everyone thinks that enlightenment will cause turmoil among the people, but in fact, ignorance and ignorance can cause turmoil, but enlightenment wisdom instead enables the people to have the ability to think and judge whether they should do this or not. Only by enlightening the people can the society be stable and prosperous! People are afraid of the unknown, and for what is known, they no longer think that it is amazing. The only disadvantage to the king is that the people have knowledge, thoughts, and thinking about it, and they will judge an emperor, and the emperor can only gain the support of the people through his diligence and wisdom, not being stupid or lazy, rather than other mysterious things. ”

Xia Hongsheng's words were actually very bold, but Li Shimin was shocked when he heard this, and turned his head to look thoughtfully at the students who had started the experiment. (To be continued.) )