Chapter 42 Section 6

On the third day after the case was resolved, Kusanagi sat in the passenger seat of a taxi and rushed to Imperial University.Sitting in the back seat are Uemura and his son. "Is it really possible to finish within an hour? I still have an interview today, and I have to return to Shinjuku before four o'clock." Uemura's tone clearly showed dissatisfaction.Suddenly someone broke into the house, and he was forced into a taxi again. It is only natural for him to be angry. "It should be over soon. He said everything will be ready before we go." "I don't know what kind of experiment you are going to do, but if you want to change my belief, it is impossible. Anyway, Zhongguang saw something that he couldn't see that day, and that is the truth. In that case, the original Didn’t the people you doubted end up being wronged?”

"We proved that the person was wronged because we found the real criminal, not by some alibi evidence." "That's one thing. That person was wronged. Doesn't it mean that the evidence we claim is correct, that is to say, there was indeed a red Mini Cooper parked there that day, and then our Zhong Guang saw it, And it's seen from a place where you can never see it." "Well, whether you are talking about possibility or impossibility depends on our experiment for a while." After listening to Kusanagi's words, Uemura Hiroshi snorted: "The final outcome is embarrassing. I can declare in advance that if the test fails, I will report it. You have to be mentally prepared. .”

"Well, this one." Kusanagi turned his head and smiled perfunctorily, then turned his head back immediately.In fact, he was also worried.I don't know what Tang Chuan is going to do. When they arrived at the university, Kusanagi led Uemura and his son to the teaching building of the Institute of Technology.The Thirteenth Laboratory of Physics is the office where Yu Chuan works. He knocked on the door of the room, and a voice of "please come in" came from inside.Kusanagi opened the door. "It's just in time, we just got ready." Tang Chuan, who was wearing a white coat, said standing next to the experimental table.

"I brought the two of them." After Kusanagi finished speaking, he couldn't help being surprised when he saw the people standing beside him.It was Yukie Takeda. "Ms. Takeda, why are you here?" Uemura also asked in surprise. "Teacher Tang Chuan called me and asked me to help with an experiment. I am also very interested. I think I must help with this." She said with a smile. "You actually remembered her phone number?" Kusanagi asked Yukawa. "It's no problem. When I bought curry buns, that bag had her phone number printed on it."

"Ah..." Hearing him say it so easily, Kusanagi felt very disappointed.But he immediately felt that he might have anticipated today's situation at that time, so he bought curry bread. "Although I don't know what you are going to do, I hope you can hurry up. Anyway, I am very busy now." Uemura patrolled the faces of Yukawa and Kusanagi. "It won't delay you for too long. Your time to smoke a cigarette is over. Have you brought a cigarette?" Yukawa asked Uemura. "Bring it. Can I smoke here?" "It is usually prohibited, except today. Please smoke here." Tang Chuan put the ashtray on the experimental table.

"Then you're welcome." Uemura took out a cigarette from his jacket pocket, put one in his mouth and lit it. "Can I smoke too?" Kusanagi asked while pulling out a cigarette. Yukawa pouted slightly annoyed, but finally nodded lightly, and Kusanagi lit a cigarette gratefully. "What is this?" Uemura asked, pointing to the two sinks side by side on the experimental table. Those are two cuboid tanks about 50 centimeters long, each filled with about 70% of the water. "Don't touch it! Now, the water inside is in a very delicate state. If you shake them, the whole balance will be destroyed."

After hearing Yukawa's words, Kusanagi, who was about to touch the water, hastily withdrew his hand back. Yu Chuan took out another thing from the pocket of his white coat, which was the laser indicator light used to indicate the position of the slides during meetings. "Mr. Uemura, even if the gates of that food factory are all open, it is impossible to see the embankment from your window. Is that what you said?" "Well, I'm right." Uemura showed a provocative look in his eyes. "I also checked the terrain myself, and it is true. Even when the gates are all open, it is impossible to connect the position between your house and the Mini Cooper in a straight line, and usually you cannot look at each other. So to say The premise is that light travels in a straight line." After speaking, Yu Chuan turned on the switch of the laser indicator light. "Ms. Takeda, please turn off the lights in the room."

Takeda agreed with a "yes" and turned off the switch on the wall.Because the curtains were also tightly drawn, the room became dark at once, so that it could be clearly seen that the light emitted from the laser indicator was traveling in a straight line. Only then did Kusanagi understand why he allowed everyone to smoke.Because he said before, it's easier to see the laser when the house is full of smoke and dust. "But," Yukawa pointed the laser at Uemura's chest, "what happens when the light bends? Isn't it possible to see things that shouldn't be seen?"

"The light is bent?" Uemura nodded in approval after finishing speaking, "You mean there is something like a mirror. If you use a mirror to reflect, this is also possible. But where is there a mirror? Where is there such a big mirror? ?” As soon as Uemura was halfway through speaking, Yukawa began to shake his head. "Who said it was a mirror. You should be quiet and take a good look. Okay, let's start. Among the two sinks, the one on the left holds ordinary water. Now let the laser pass through there." After finishing speaking, Tang Chuan put The laser pointer slowly points to the sink on the left.Zhongguang let out an exclamation of "ah".He is short and can just see the sink from the side.

The light from the laser is refracted slightly by the sides of the tank, and then shines straight into the water. "By the way, I mixed a small amount of milk into the water to see the laser more clearly," Yukawa said. "The light is bent." Zhongguang looked up at his father and said. Uemura suddenly exhaled. "Can it bend without reflection? Light bends when it travels in water. This is common sense in science. But, how can there be such a big water tank at that scene?" "You are such a quick-tempered person," Tang Chuan said a little Annoyed, "Let's not consider the phenomenon of light refraction in the water tank for now. What I want you to see is that the light is still a straight line in the water."

"That's for sure, it's a straight line in the same medium." "Next, let's let the light pass through another tank." Yu Chuan turned the laser light to the tank on the right. "Ah!" Kusanagi was the first to make a sound this time, and then Tadahiro and Xingke also exclaimed "Wow", while Uemura stood there dumbfounded. The light that enters the tank does not travel in a straight line.Slowly bend into curves as the light goes down.Obviously, it can be described as "curvy". "What happened?" Kusanagi asked. "Of course it's tampering in the water." Tang Chuan said, "This is sugar water, the concentration on the top is low, and the concentration below is high. When light propagates from a low-concentration medium to a high-concentration medium, it bends, and the concentration The higher the value, the greater the index of refraction, so light bends more downward." "So that's what happened." Kusanagi pressed his face to the sink, "It's the first time I've seen this phenomenon in my life." "Maybe you are seeing it for the first time, but you should know that there is a natural phenomenon that has the same principle as it." "Really? What's going on?" "A few days ago," Tang Chuan went to the wall and turned on the light switch, "Didn't Mr. Uemura tell us about the accident?" "Accident?" Uemura looked surprised, "What? What accident?" “That day, there was an accident in the food factory across from your house,” Cao Peng said, “the factory used a large amount of liquid nitrogen to cool food. That day the storage tank burst, and the liquid nitrogen flowed out, and part of the floor of the factory was damaged.” It's frozen." "This is the specimen formed at that time." Tang Chuan held the half-broken sneaker in his hand and showed it to everyone, "It was broken by something after it was quickly frozen. After thawing, it became what it is now. .” Seeing the broken shoe, Uemura was somewhat surprised. "How could such a thing happen? Does it have anything to do with today's experiment?" This is what Kusanagi wanted to know, and he also turned his attention to Yukawa. "The liquid nitrogen flowed out, and the people in the factory panicked. They felt that they had to take a breath immediately, so they opened the door. What happened? The hot air in midsummer flowed into the factory. At that moment, the ground of the factory was cold Nitrogen, above which is hot air, forms a gas layer with a very large density difference," Tang Chuan said, pointing to the tank containing sugar water, "although there are differences between liquids and gases, the principle of light refraction through them is the same .” "That is to say, if there was a laser passing through the factory area at that time, the same bending as before would have happened?" "It should be like this." Yu Chuan looked at Kusanagi and nodded. "If that's the case... what will happen in the end?" "When we look across the factory, the object we see is not where it should be. That is to say, we can see things that we can't normally see, such as embankments." "There will be such a thing... oh, it's like this in principle." Kusanagi muttered.Although he could understand it in his mind, he hadn't formed any clear image yet. "Didn't I just say that, you should be very aware of that natural phenomenon with the same principle." Tang Chuan continued, "It's a mirage." "Ah!" Kusanagi nodded. Yukie Takeda, who had been listening to them, nodded with understanding. "No, it's not a mirage!" Uemura waved his right hand downward as if he wanted to cut something off. "Didn't Ms. Takeda see it too? Wasn't the gate of the factory closed at that time?" "I went to the factory to investigate and found that the door was opened for a very short time," Kusanagi said. "No, no, hey! Zhongguang, tell them well! You were floating in the air that day, and then saw that scene!" However, the boy did not agree with his father's words. I'm not floating in the air," the child cried, "I just feel light on my body, and my father said I was floating in the air..." "Zhongguang!" Uemura shouted hysterically. Tang Chuan walked up to Zhongguang and squatted down. "Tell me honestly, how did you see that scene? Did you see the opposite side because the gate of the factory was open?" Zhongguang thought for a while in silence, then shook his head blankly. "I don't know, maybe it's like this. I was very confused at the time and couldn't remember." "Really!" Tang Chuan stroked the young man's head, "It's okay, there's nothing I can do about it." "There's no evidence that it was a mirage," Uemura said. "It's all just speculation." "Yes. But don't you say that he is out of the shell, and there is no evidence?" Yu Chuan's rhetorical question left Uemura speechless.At this moment, Yukie Taketa spoke. "Mr. Uemura, don't mention this matter anymore, I know it all!" "I know...you know what?" "You tampered with Zhongguang's painting. I was very surprised when I saw the photos published in the weekly magazine. Zhongguang's original painting was not so clear. Although it looked like a red car, it didn't have a white roof. And the tires. You added those later, didn't you?" Her testimony seemed to be true, and Uemura's face twisted in pain in front of this evidence. "That's because... I did it to make it easier for everyone to understand what I said." "What are you talking about? Isn't this deception? Do you want to teach Zhongguang this?" Xinghui stared at Uemura and asked. Uemura bit his lip and was speechless.In the end, as if he had made a decision, he took Zhongguang's hand. "You showed me a very meaningful experiment, thank you very much! However, this is not conclusive evidence, I will consider it as a reference. I have an appointment in a while, so I will leave first." "Mr. Uemura..." Ignoring Xinghui's call, he pulled his son up and walked out of the room. Hearing the sound of footsteps gradually walking away, the remaining three people in the room fell silent. "Aren't you going to chase after it?" Kusanagi asked Xinghui, "For that child." Xing Hui woke up like a dream, bid farewell to the two of them, and ran out. Kusanagi and Yukawa looked at each other and let out a long breath. "Can't you also talk to children face to face!" Kusanagi said. Yu Chuan rolled up the sleeves of his white coat and showed him some red spots on his wrists. "What's this?" Kusanagi asked. "rubella." "what?" "It's better not to do things you're not used to." After Tang Chuan finished speaking, he pulled the curtains open completely.