Back to Datang Jianzuo City

Chapter 112 Refraction and Air Pressure

When we first came into contact with physics, we were all attracted by interesting experiments.We are used to some experiments in normal times, but when the teacher explained the reasons, we would all sigh, wow... so it is like this!
Li Tai and Ding Yi squatted in a sunny place in the corner, with a basin of water in front of them.Ding Yi took out a glass mirror, and under Li Tai's surprised eyes, inserted the mirror obliquely into the water, facing the sunlight.

"King Yue, look at the wall!"

Li Tai looked up, and there was a rainbow on the wall!Li Tai stammered, pointed at the rainbow, and asked, "Ding...Ding Yi, this...this...you made it?" Everyone at this time knew that the rainbow was a manifestation of God after the rain!And Ding Yi actually made a rainbow!
"Well, you can too, come and try!" Ding Yi encouraged.

Li Tai pointed at himself unconfidently, "Can I do it too?" Now he felt that Ding Yi looked a little fuzzy!
He took out the mirror, handed it to Li Tai, and instructed him what to do.Sure enough, a rainbow appeared on the wall again!
"Your Highness, this is a miracle! Your Highness is truly a god!" Li Tai's servant fell to the ground to compliment him, but he hadn't seen him say it just now.

Ding Yi scolded viciously: "What nonsense! This is just a physical optics experiment! You can come too!"

The servant immediately refused, which is not something he can do!Li Tai is not so surprised now, he can do it himself, he turned to the servant and said, "Don't say such things in the future! You can try it too!"

The servant who was rejecting all over his body did not escape the fate of refracting the rainbow.

"Ding Yi, what's the reason?" Li Tai was eager to know the truth after doing the experiment.

Ding Yi said nonchalantly: "Sunlight is a mixture of seven colors, and what we do is to split it. Of course, there are two other kinds that people can't see. We'll talk about that later!"

The sunlight turned out to be a mixture of seven kinds of light!Hearing this kind of remarks for the first time, Li Tai became even more curious about physics in his heart, and there are two other things that he can't see... This Ding Yi always arouses my thoughts, but he is not in a hurry to answer!

"This is optics in physics. Today we are working on air pressure. King Yue, come, let's move on to the next one!"

"That's right! There's also the air pressure!" I was surprised by the rainbow just now, but I forgot about the air pressure.

A semi-finished glass from a glass workshop, mixed with some air bubbles, the whole glass is green with traces of other colors.Li Tai exclaimed Liuli, but Ding Yi didn't think so.

Cover the mouth of the cup with a handkerchief made of cotton cloth, and tie the handkerchief on the cup with a string.Then let someone carry the kettle and pour water on the handkerchief. From the outside, you can barely see the water level, and the cup is about four-fifths full. Ding Yi stopped.

Holding the cup with his backhand, he turned the cup abruptly, only to see that the water was blocked in the cup by the handkerchief, and there were only a few drops of water dripping from time to time.

"King Yue, it's because of atmospheric pressure!"

Li Tai was surprised that the water did not fall, and asked, "What is atmospheric pressure?"

Putting down the water glass, drying his hands on his clothes casually, he said seriously: "To know the atmospheric pressure, we must first know what the atmosphere is!"

"All ears!" Finally got to the point, Li Tai also asked Ding Yi for advice with a correct attitude.

"The atmosphere is actually the air we breathe in general. For example, we humans have to breathe, and what we breathe is the atmosphere. And this atmosphere is divided into many types, nitrogen, oxygen, carbon dioxide, and other rare gases! Because there is no suitable tool now, I can't separate them and show you. This will also be the direction of your research, try to separate these gases! And these gases are also light and heavy, for example. You will The lard is poured into the water, and the lard floats on the surface of the water. It is also like Pangu created the world, the light one floats up, and the turbid one sinks! Of course, Pangu is only imagined by people, and it should not be taken seriously! We study physics to understand the world. The composition and the reason! In the past few days, you have followed the teachers of the academy and studied physics with me, starting from the basics, and re-understanding all things in this world!"

Li Tai was stunned, he didn't know anything about oxygen and carbon dioxide!However, Ding Yi agrees with what Ding Yi said about rediscovering everything in the world!The two experiments just now have completely overturned his cognition!
Well now, there is one more person in the physics class, and Ding Yi didn't reveal Li Tai's identity, but only said that a new student has arrived.The teachers were not curious either, and Li Tai was obsessed with physics and didn't care about others.

Ever since Changle came to Shiping, he stayed for three days!Seeing with Tang Xue that the two were teasing students in the college, instigating Erha to destroy Ding Yi's garden, watching Ding and Li Tai and the others conduct experiments... She thinks this place is much more fun than the palace!
Finally, she was going back to the palace three days later, because Li Er didn't see her daughter back, so she sent someone to remind her!Chang Le took the notebook written by Ding Yi to Li Er, and left sullenly...

Tang Xuejian, who just had a playmate, suddenly changed again!

……

In Xue Yantuo's tribe, Xiao Jian led people to reconcile with Ding Li.When Ding Li received a letter from the young master, he hid in the tent to read the letter.

On the third day after Xiao Jian arrived, Wu A Tuo, the leader of the tribe, finally received Ding Li. Ding Li had been here for three or four days, but Wu A Tuo never saw Ding Li.

The tribe of Wuato has more than 1 people, as many as 2 cattle and sheep, and more than [-] horses.Ding Li specially selected this tribe. When he came here, he thought it was bigger!

Enter the tent, Wuato and several leaders are in it.Ding Yi bowed his hands and saluted, "Ding Li met the leader!"

Wu A Tuo chattered a lot, and the interpreter beside Ding Li said, "People from Datang, I heard that you want to do business with us?"

"Yes, Your Excellency, Chief. I was ordered by Marquis Shiping of the Tang Dynasty to bring warmth to the grassland people!" Yesterday, the young master explained some things when he received a letter from Ding Yi.

Wu A Tuo said with contempt on his face, "Hehe! I don't believe you people from Tang Dynasty have such good intentions!"

Knowing that he would not succeed so easily, Ding Li explained: "Your Excellency, we Shi Pinghou have the world in mind and have no prejudice against the people on this land! You may not know that our Lord Marquis is worried that the tenants will not have enough to eat, so we deliberately say If they don’t send their children to study, they will charge [-]% of the rent. If they send their children, they will only charge [-]%! In recent years, there have been many natural disasters in the Tang Dynasty, and disasters have also occurred on the grassland. It is said that because of the weather, many people People are starving to death and freezing to death! Our Marquis is sympathetic to the heaven and earth, thinking that the people in the grassland are still suffering from the severe cold, and we can’t help feeling sympathetic! That’s why he specially entrusted me to bring food and salt to the people in the grassland!”

When they heard about grain and salt, the crowd couldn't sit still.They really need these now!Wuato clenched his fists, fighting against each other.

"I don't know what the Marquis Shi Ping exchanged for grain and salt? It's impossible for horses, cattle and sheep! We grassland people live on these!"

"The leader is worrying too much, we only need wool!"

…………

(End of this chapter)