future library.

Chapter 86 Tongue War (2)

Star Warlocks are not only composed of countless articles, but the people present are also numerous powerful figures in the Great Xia Dynasty. Therefore, even though Cheng Jinzhou was full of confidence, someone still asked: "Then please explain, what is refraction. "

"That's another article I'm going to write, if I tell you..." Cheng Jinzhou flipped his hands deliberately.

The obvious distrust made Tang Wen very angry. If it wasn't for other people's sake, it might have erupted long ago. He suppressed and said: "As a formal meeting, your speech and results will be recorded and counted as As the result report of the Astromancer..."

With his hands behind his back, Cheng Jinzhou faced the whiteboard and smiled complacently.

Since ancient times, those who can write papers can be teaching assistants; those who can make one paper into two are called lecturers; , to be a professor.

Today, Cheng Jinzhou feels that he can be regarded as an associate professor by transforming the simple and clear geometric optics into an incomprehensible jerky academic report.It's a pity that the thrill of success can't be shared with everyone, it's like the feeling of leaking something indecent in your pants-it's all cold and cold in private.

"Cheng Jinzhou Star Warlock?" The host interrupted Xiao Cheng's reverie again: "Do you need experimental equipment?"

Astromancers care most about practical applications, and experiments are naturally an indispensable part of their research.The host's words were in an obvious interrogation manner. It was obvious that he was also leaning towards An Fengxing Warlock - in fact, although Jiang Huangxing Warlock's faction always occupied a dominant position in the imperial court, in the outer peninsula Within the scope of the radiated association, his opponents are even more.

Cheng Jinzhou glanced at the other party with contempt. If someone suddenly asked him "how to do an experiment to prove the existence of refraction" when he first arrived in this world, he might have difficulty repeating the standard experimental steps for a while. But after being fully prepared, , If you continue to find trouble with this kind of middle school level issue, you are making yourself uncomfortable.

"I want a glass block, white paper, positioning pin, ruler and a piece of wood." Xiao Cheng reported it as if reciting it.

Such a proficient and accurate explanation immediately made Tang Wen feel that something was wrong. He wanted to seek help from An Feng Star Warlock, but he could only see his back.

Xu Gu star warlock hurriedly ordered to go down, and after a while, three star warlock apprentices came up carrying three boxes. When they opened it, they were all glass bricks of different sizes.

"Really glass." Cheng Jinzhou muttered to himself, in Shaonan City, he had no chance to see such a thing.

"It was bought from another place." Xu Gu briefly introduced.Xiajing's branch is the largest among the many branches of the Great Xia Dynasty. Needless to say, all kinds of materials are available, and it is also one of the transshipment centers of other cities and even countries. It is not uncommon to order some glass bricks from stock.

Cheng Jinzhou raised his eyebrows. He knew that glass existed in Europe in the 13th century, but he didn't expect that although the astrologers failed to make the development of the times faster, they made it easier for the East and the West to communicate.

He randomly selected a piece of glass the size of a brick. While posing on the table, Cheng Jinzhou thought to himself: If this brick accidentally fell to the ground and broke into pieces, I wonder if the association would feel pain.

While doing a standard refraction experiment, he introduced: "We see the position of the fish in the water. If we use a harpoon or something to stretch it down, it will often deviate. The reason is refraction."

Although the visual principle of the eyes was discussed by early humans, it didn't have much effect. The astrologers present didn't want to change the topic, they just listened quietly and didn't speak.

Cheng Jinzhou was inexplicably nervous for a moment, and then became serious again. Using the positioning pin, first determine the position of the beam of light that does not pass through the glass, and then add glass bricks, and determine the position again. The angle between the two can be clearly seen.

Tang Wen breathed a sigh of relief. In his opinion, if it was just these things, he would not be completely ashamed today. The experiment in front of him is too simple. If what he wants to explain is just the existence of refraction, there is nothing rare in essence. , although you don't intend to study optics, you do understand some of the basic content.

Although some people on Jiang Huang's side didn't believe in his so-called geometric optics, they couldn't easily refute it, so the astromancers on An Feng's side looked at each other.

Finally, when Cheng Jinzhou was about to finish, one of them stood up and said: "You can prove the existence of what you call refraction by doing this, but we all know this, and it has nothing to do with geometry."

"So what do you need?"

"Quantitative relationship." The astromancer had a clear mind.Quantitative relationship is the most used thing, but it is also the most difficult part, and it is easier to be singled out for omissions.

The completion of a formula often requires several generations of hard work, and those who are too impatient often fail.Cheng Jinzhou didn't have similar questions, but he didn't speak smoothly. He only smiled twice and said: "This Warlock Tang Wenxing just now, I would like to ask you how you positioned yourself to attack enemies in the water."

He almost used the Six Meridians Excalibur to explain the opponent's star array.

Tang Wen unexpectedly got caught again, and said with a look of misfortune: "There is usually a deflection angle. What you said is what we know."

From experience, he can understand the existence of deflection angles, but positioning is far from enough.

Cheng Jinzhou smiled mysteriously, wrote down two simple trigonometric functions, sin and cos, on the blackboard, and then replaced them with symbols familiar to astrologists.Forget it, he said lightly: "The ratio of the sine value of the incident angle to the sine value of the upper refraction angle is equal to the ratio of the refractive index of the second medium to the refractive index of the upper medium one. It is a very clear formula, Mr. Tang, please use this formula , experiment with the refraction of water."

The formula is easy to understand, Tang Wen frowned and said, "How do I know what the refractive index you are talking about?"

"The refractive index of water is 1.33, so it's free news for you."

Of course, Tang Wen refused to give in. He simply mobilized the star array, made an ice pond the size of a bathtub on the ground, filled it with water, threw the jade pendant he was carrying into the water and said, "If you can accurately calculate Where is the eye on my jade pendant, I will accept your formula, if not, please give me a piece of jade pendant."

You don't need to look at it to know that the price of the jade pendant that Tang Wen carries will definitely not be cheap, but Cheng Jinzhou agreed without hesitation, and recruited the apprentice astromancer who had been waiting at the side and said: "Find two stars who can measure angles." Warlock here."

"Zhang Xiao can do it."

The apprentice who was called was 20 years old, and he had to hold the junior salute when facing Cheng Jinzhou.

"Be more precise." Cheng Jinzhou ordered, and explained the algorithm of the refraction theorem on the whiteboard. His voice was just enough for all the star warlocks in the room to understand the content. At this time, everyone had an idea of ​​Tang Wen's fate. Anticipate.

Mathematics is a very practical subject. If you can do it, you will have a clear answer. Making up data is the most unwise approach.

In addition to using a little knowledge of trigonometric functions, the refraction theorem itself can be calculated with only an elementary school level. The apprentice listened to the certification and walked up to it in two or three minutes, facing the jade pendant in the ice basin and calculating.

"27 degrees 13 minutes, 12.54 centimeters above, 47.60 centimeters above." According to Cheng Jinzhou's description, what the apprentice astrologist reported was actually the coordinates.

An Feng was slightly moved. He still understood the scope of his old friend's research, and he had a strange feeling about Cheng Jinzhou's proficient use.

Cheng Jinzhou looked at Tang Wen confidently and said, "Please."

Looking at the jade pendant that was still white in the ice basin, Tang Wen gritted his teeth, and according to the coordinates Cheng Jinzhou said, a ray of light was instantly emitted from the index finger of his right hand.

Several curious star warlocks had already rushed forward to watch.

The light is yellowish, and it is clear at a glance.Part of the light goes straight through the bottom of the pelvis, but part of it easily passes through the eyelets on the upper part of the jade pendant...

More than one person exclaimed.

Even Star Warlock An Feng and Star Warlock Jiang Huang couldn't help their eyes gleaming. For Star Warlocks, accurate positioning is especially rare, and their uses can be said to be infinitely wide.Tang Wen also lost the idea of ​​winning. He stared blankly at his fingers and thought: If he hides underwater in the future, wouldn't he be able to accurately attack the star warlocks and airships passing by in the sky?

In fact, the refraction of light mainly affects the human perception system. If he can use high-energy weapons, the barrier of water to the weapons can be completely ignored.

Warlock Jiang Huangxing raised his body slightly, as if his torso, which had not moved all day, needed to move.He himself had many interests in the Great Xia Dynasty, so he could immediately think of the subtleties in Cheng Jinzhou's design.

Although there are a lot of researches done by the astromancers, they are mainly used by the astromancers themselves. Basic research usually needs to be promoted by the association-the results produced by spending countless funds are relatively free, and the senses are naturally lower.

Seeming to see what he was interested in, Deng Zhu, a second-level star warlock, immediately asked: "Mr. Cheng, does the refractive index of the medium change? How to prove it? And how to find it?"

"In some cases, it changes. As for the proof method, I haven't thought of it yet. I have another formula for the calculation of the refractive index of the medium." Cheng Jinzhou is very shrewd now, and this is the amount of several papers. It's a good time to accumulate contribution points. He is not like a high-level star warlock who can live comfortably.

Geometric optics is the most basic part of physics in later generations. Even if many people think of military purposes first, it will not have too much impact on the times, and it will not have much impact on Cheng Jinzhou's superior knowledge. It is his favorite content.

The scene was a bit chaotic, and after a while, An Feng star warlock said slowly: "Cheng Jinzhou star warlock raised a series of difficult problems for us, I'm afraid we need to think about it for a while."

The star warlock on his side immediately collapsed as if he had failed.

……

(End of this chapter)