Future library

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 deliberately turned his hands.

The obvious distrust made Tang Wen very angry. If it weren't for other people's sake, he might have exploded earlier. He suppressed and said: "As a formal meeting, your speech and results will be recorded and calculated." This is the result report of the Star Warlock..."

Cheng Jinzhou put his hands behind his back and smiled proudly while facing the whiteboard.

Since ancient times, those who can write a paper can be called teaching assistants; those who can turn one paper into two are called lecturers; those who can turn one paper into three are called associate professors; those who can hold one paper in hand and have endless variations and derivatives , can be a professor.

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

"Cheng Jinzhou Star Warlock?" The host once again interrupted Xiao Cheng's reverie and asked, "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 radiation association, he has more opponents.

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 brick, white paper, positioning pins, ruler and compass and a wooden board." Xiao Cheng reported as if reciting.

Such a skillful and accurate explanation immediately made Tang Wen feel that something bad had happened. He wanted to seek help from An Fengxing Warlock, but he could only see his back.

Warlock Xu Guxing hurriedly ordered to go down. After a while, three star warlock apprentices came up carrying three boxes. When they opened them, they turned out to be glass bricks of different sizes.

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

"I bought it from other places." Xu Gu introduced simply. Xia Jing's branch is the largest among the many branches in the Great Xia Dynasty. Not only is it fully equipped with all kinds of materials, but it is also one of the transshipment centers for other cities and even countries. It is not unusual to order some glass bricks in stock.

Cheng Jinzhou raised his eyebrows. He knew that glass existed in Europe in the 13th century, but he did not expect that although the Star Warlocks failed to make the times develop faster, they made communication between the East and the West easier.

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: "When we see the position of fish in the water, if we use a harpoon or something to reach down, it will often deviate. The reason is refraction."

Although the visual principle of the eyes had been discussed by early humans, there was not much success. The star warlocks present did not want to change the topic, but listened quietly without speaking.

Cheng Jinzhou was inexplicably nervous for a moment, and then he became serious again. He used a positioning pin to first determine the position of the light beam that did not pass through the glass, then added the glass bricks and determined the position again. The angle between the two was clearly visible.

Tang Wen breathed a sigh of relief. In his opinion, if it was just these, he would not be completely embarrassed today. The experiment in front of him was too simple. If he wanted to explain only the existence of refraction, there was nothing rare in it. , although you have no intention of studying optics, you do understand some basic contents.

Although some people on Warlock Jiang Huangxing's side did not believe in his so-called geometric optics, it was difficult to refute, so the Star Warlocks on Warlock An Fengxing's side looked at each other.

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

"So what do you need?"

"Quantity relationship." The star warlock's mind was very clear. The quantitative relationship is the most used thing, but it is also the most difficult part, and it is easier for people to pick out omissions.

The completion of a formula often requires generations of hard work, and those who tend to be 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 Divine Sword to explain the opponent's star formation.

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 angle, but positioning is far from enough.

Cheng Jinzhou smiled mysteriously and wrote two simple trigonometric functions on the blackboard, sin and cos, and then replaced them with symbols familiar to Star Warlocks. That’s all, he said calmly: “The ratio of the sine of the incident angle to the sine of the refraction angle is equal to the ratio of the refractive index of medium two to the refractive index of medium one. It’s 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 is?"

"The refractive index of water is 1.33. This is free news for you."

Of course Tang Wen refused to give in. He simply activated the star formation and made an ice pool the size of a bathtub on the ground. After filling it with water, he threw the jade pendant he carried with him into the water and said, "If you can accurately calculate Wherever the eyes on my jade pendant are, 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 with you will definitely not be cheap. However, Cheng Jinzhou agreed without hesitation and called the star warlock apprentice who was waiting aside: "Find two stars that can measure angles." Warlock, come here."

"Just Zhang Xiao."

The apprentice who was summoned was 20 years old, and he had to show the courtesy of a junior 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. After listening to the certification, the apprentice understood it clearly and walked forward in two or three minutes to position the jade pendant in the ice basin and start calculations.

"27 degrees and 13 minutes, 12.54 centimeters in length, 47.60 centimeters in height." According to Cheng Jinzhou's description, what the star warlock apprentice reported was actually the coordinates.

An Feng was slightly moved. He still understood the scope of his old friend's research, and had a strange feeling about Cheng Jinzhou's skillful 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 followed the coordinates Cheng Jinzhou said, and his right index finger instantly emitted a ray of light.

Several curious star warlocks had already rushed forward to watch.

The light is yellowish and is clear at first glance. Some of the light passes directly through the pelvic floor, but some of it easily passes through the thread holes on the upper part of the jade pendant...

More than one person exclaimed.

Even Warlock An Fengxing and Warlock Jiang Huangxing couldn't help but have their eyes gleaming. For Star Warlocks, accurate positioning is particularly rare, and their uses can be said to be infinitely wide. Tang Wen also lost the idea of ​​winning. He looked at his fingers blankly 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 visual system. If he can use high-energy weapons, the water's obstruction to the weapons can be completely ignored.

Warlock Jiang Huangxing lifted 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 of Cheng Jinzhou's design.

Although the Star Warlocks conduct a lot of research, they are mainly used by the Star Warlocks themselves. Basic research usually needs to be promoted by associations - the results produced by spending countless funds are relatively easy to obtain, and the senses are naturally inferior.

Seemingly sensing his interest, Deng Zhu, a second-level star warlock, immediately asked: "Mr. Cheng, does the refractive index of the medium change? How to prove it? How to find it?"

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

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

The scene was a little chaotic. After a while, Warlock An Fengxing said slowly: "Warlock Cheng Jinzhouxing has asked us a series of difficult questions. I'm afraid we need to think about it for a while."

The star warlock on his side suddenly fell down as if he had failed.

…