In the world of dragons, only I am not attacked

Chapter 180 Space and Time

Physics class.

Wu Lei is sitting next to Li Chenguang, playing with the switch, stuffing biscuits, potato chips, chocolate, cakes, shaqima, fudge, etc. into his mouth from time to time. As a fat man, his insistence is not to stop talking in class

Li Chenguang was sitting next to him, lying on the table with folded hands, looking at the blackboard with a helpless look.

Li Kairong, a well-known professor of the Department of Physics, who is nearly seventy years old, has white hair and talks eloquently on the desk.

Wu Lei ate for a while, then turned to look at Li Chenguang, "Why don't you play games, don't you also have a switch, I still want to connect with you."

"...forgot to bring it."

"How about playing the king?"

"You play, I don't really want to play today."

"What's wrong with you, people who don't know, thought you were broken in love."

Wu Lei said, stopped the fat palm holding the biscuit, paused and said, "You won't be really broken in love, right?"

"What kind of love is lost, where can I lose love, I am, I am..."

Li Chenguang didn't know what happened.

"By the way, didn't you like class 6 in high school? What happened afterwards?"

"How about what?"

"How are you two, did you do anything?"

"I like her already, what do you want from me? You don't want me to go up and be humiliated by her."

"...What you said is quite reasonable."

Li Chenguang deeply agrees.

Wu Lei chewed on the biscuits and said, "As long as I don't touch her, I can always like her. If I want to touch her, I'm afraid I won't be able to continue to like her. Women, it's really troublesome in some ways."

"..."

Sometimes, you don't understand why this person who hasn't spoken a few words to girls can express such emotion.

Li Kairong said in a slightly old voice on the podium, "Today I will tell you about dimensions. We all know that a line formed by countless points is one-dimensional, and a surface is formed by countless lines. Two-dimensional, and the composition of countless surfaces is a three-dimensional space."

"Any dimension is a dimensionality reduction blow to low-dimensional creatures. For example, an ant living in one dimension can only move left and right. When two ants meet, they cannot go around, because they do not go up and down. concept, but two-dimensional creatures have up and down, and ants can go around from up and down."

"And suppose a group of ants live on a two-dimensional plane, that is, a target, and now a marksman comes."

"The marksmanship is superb. The bullet hits a flat target, and the distance between every two bullet holes is exactly 10 centimeters. Scientists among the ants living on the target will find that the universe has an "objective law." ", there will be a "space hole" every 10 centimeters, so they spent a lot of manpower, material and financial resources, calculated the perfect theorems and formulas based on observation and research to fit this law, and evolved into a discipline, which is Yes, our current physics."

"Physics is a magical thing. It may be the law of the world, or it may be based on the impromptu performance of the sharpshooter. A large number of scientists have spent their entire lives unable to pry into the essential reason for the formation of the 'space loophole'. We can only base on this Research."

Then, a classmate asked.

"Teacher, so, the physics of our three-dimensional creatures is probably driven by an interest of four-dimensional creatures? Like the speed of light, the speed of sound waves, and the gravity of the earth are all false?"

Li Kairong nodded, "Even if we think the sun rises from the east, we regard it as the truth through observation, because it rises like this every day, every month, and every year. In fact, this may just be a superb marksman's skills."

Li Chenguang lay on the table and looked at Professor Li Kairong on the podium, "Speaking of which, this professor's lectures are quite lively."

"Of course, I heard that the school hired a big cow with a lot of money, academician of the Chinese Academy of Sciences."

"Amazing, it's the first time I have the urge to attend a class."

"Don't listen, come to the king, I will accompany you."

"..."

Another student asked, "Teacher, what do you mean, do four-dimensional creatures still exist?"

"I do not know."

Li Kairong said in his unique elegant voice, "Just like two-dimensional bullseye creatures cannot see three-dimensional creatures, three-dimensional creatures can't see four-dimensional creatures, just like there is huge dark matter in the universe, dark matter Energy, while our five senses can feel and touch only [-]% of the matter in the universe.”

"Even if we are sitting here now, there may be a large amount of dark matter like a meteorite. Dark energy penetrates our body, but we can't feel it."

Then, some classmates sighed.

"A large meteorite."

"Stains stains."

"Putting it into my body sounds even more exciting."

"Then when will our human technology develop to recognize four-dimensional creatures?"

"It's very difficult. Moreover, we don't know whether there are four-dimensional creatures. There is still a common saying in the scientific community that if there are four-dimensional creatures, then whether we can recognize four-dimensional creatures does not depend on our technology. and progress, but depends on whether they are willing to let us know."

Li Kairong said, and asked everyone a question, "Everyone knows that compared with two-dimensional creatures, we have increased the height on the plane, so what is another name for our three-dimensional creatures?"

Then Tao Xue, secretary of the league branch sitting in the front row, raised her hand high.

Li Kairong pointed at her, "This classmate will tell you."

Tao Xue stood up happily, "We are space creatures, which refer to three-dimensional creatures that live in space and can swim freely in space."

"That's right, three-dimensional creatures are also called space creatures."

Li Kairong looked at her kindly, "Then the four-dimensional creature, add another dimension to the space, do you know what it is called?"

Tao Xue thought for a while, "...to add another dimension to the space?"

"what is that?"

She frowned and thought for a while, then shook her head.

four-dimensional?

She can't think of it.

Li Kairong motioned for her to sit down.

"So does anyone else think of it?"

There were students whispering in the audience, but no one got up to answer. If you want to add another dimension to the three-dimensional, how should it be increased? Doesn’t it have length, width and height?
Then Li Chenguang raised his hand rarely.

Li Kairong pointed to Li Chenguang who was sitting in the third row from the bottom of the second row, "This classmate, tell me."

Li Chenguang stood up, "Did it increase the dimension of time?"

Li Kairong smiled, "That's right, this classmate is very smart, and Einstein once suggested that if the third-dimensional beings are space beings, the fourth-dimensional beings are time beings, and beyond that we can't imagine It's gone."

Wu Lei looked at Li Chenguang in surprise, "You are so smart, you actually raised your hand to answer questions in class."

According to their usual habits, they should bury their heads low like mice in the ditch, for fear of being called.

Li Chenguang replied weakly, "It's boring."

"You're wrong."

The students were talking again, "Time creature?"

"Shuttle time."

"Can they walk back and forth in time?"

"It's terrible."

"Isn't the time messed up?"

"..."

There was an uproar underneath.

Someone else laughed, "Then how do they pass the time? For example, the world of four-dimensional creatures also sells the lottery. If they get the lottery numbers today, they can go back to yesterday and buy today's winning numbers. Everyone will be a millionaire."

There was another burst of laughter underneath.

"Besides, if time can be traversed by them, wouldn't they be dead? If I die today, I will travel to ten years ago."

Li Kairong listened to the enthusiastic discussions of the students below, and just smiled. After everyone finished the discussion, the audience became quieter, and then he continued, "Two-dimensional creatures can't see three-dimensional, and three-dimensional creatures can't see four-dimensional." , everything we do is based on guesswork.”

"Think about it, we are space creatures, but can we travel through space infinitely? You can walk from home to school, you can take a spaceship from the earth to the moon, but can you sit on Neptune? Even if you go to Neptune, can you Out of the solar system, even out of the solar system, can you out of the Milky Way?"

Then some students said, "It means that we can't live that long, if we are given an infinite life span."

Li Kairong smiled and said, "The farthest star that has been observed so far is 128 billion light years away from us. Even if you have an infinite lifespan to catch up, why do you think the universe will not expand and move away from you at a faster speed? "

"..."

Now, everyone was silent again.

"It can't be done. Even if we are three-dimensional creatures, we can't travel infinitely in space. We need to consume costs, manpower, material resources, and time. Even if science develops, human life is extended, and aircraft speed is faster, we It can only extend the physical distance that can be shuttled infinitely, to explore as much as one percent of the space as possible, and there is no way to go back and forth.”

"Similarly, the current mainstream view is that four-dimensional creatures, that is, four-dimensional time creatures, can move on the coordinate axis of time to travel through time, but they also have to pay a price, and they don't travel infinitely. As for what the cost is, the current Can't know either."

Someone asked, "What about their history, isn't it a mess?"

"I can't imagine, guess there should be a special force, or a special rule, which will counteract and correct this, just like in an ecosystem, if the number of plants, animals and microorganisms is maintained at a certain level and does not change much , This state is called ecological balance, ecological balance can be destroyed, just like we prey on a large number of eagles, rabbits will reproduce infinitely, but ecology will not allow an object to be out of balance, he will use the power of balance to adjust, such as disease , The plague, like a new natural enemy, uses a force similar to rules to adjust the dynamic balance. If there is such a balance in space, then it should also exist in time.”

Someone asked again, "Then teacher, if there really are four-dimensional creatures, will he suddenly want to deal with us one day?"

"It's about the same as whether you want to run over ants passing by."

Li Chenguang was listening to a class, and Wu Lei directly put the switch into Li Chenguang's hand.

Excitedly picked up the mobile phone in the drawer, "You play first, some girls ask me to play the king."

Li Chenguang immediately came over and said, "Who? I don't know about the girl you hooked up with. Your level of king is also average. Do you want me to take her?"

"You go."

Wu Lei looked disgusted, "There is no boat here that can carry you, the new era, the new era is beckoning to me, la la la ~~ I feel that the girls in college are much more kind than in high school, and they won't flog you at every turn. .”

"Is there? Why do I find it more difficult to deal with?"

Li Chenguang glanced at the note name on the chat box of the mobile phone, "Su Tingting!"

The devil whispered, "Trust me, women are a disaster, and the more beautiful the woman, the more she will hurt you."

"so what?"

"Push it to me, I'm not afraid of getting hurt."

"go away."

……

……

As soon as Yin Ruosheng walked out of the door after class, she saw Yin Feng opposite, and Yin Feng waved to her.

Yin Ruosheng walked up with the textbook in her arms, and said with a smile, "What a coincidence."

"Unfortunately, I'm waiting for you."

Yin Feng had a calm smile on his face, "Just chatting about tomorrow's sports meeting."

"This one……"

Yin Ruosheng is a small employee in the secretary department, so if you want to talk about business, you can't talk about her.

I've never seen a big boss chat directly with a young man, and there's still the head of the secretary department and the deputy head between them.

If there is anything, you should talk to them first, and then they will pass it on.

There are some things that everyone knows well.

but.

Yin Ruosheng laughed dryly, "Not today, I have an appointment."

Yin Feng showed a bit of regret, "Is that so? That's really a pity."

"Next time."

Yin Ruosheng smiled and said, "Actually, just make a phone call, you don't have to make a special trip to wait for me."

Because she found that the boys and girls passing by were all looking at her.

Whispering there.

"That man is too handsome, my God."

"It's so handsome that it's earth-shattering, and it's so handsome that it's unbelievable, so who is it?"

"Idiot, we don't even know the president of the student council, haven't we spoken on stage before?"

"I'm probably playing with my phone, I'm indeed the most handsome guy in Jiangnan."

"Look, look, it's our school belle and student council president."

"It's such a good match, this pair of CPs."

"Worthy of being the belle of our university."

"..."

After the crowded class, the two of them stood aside, as if they were actors under the spotlight, compared with those around them, and became the focus of the crowd.

Yin Feng smiled, "A lot of things have to be said in person to be effective, otherwise it would be too insincere."

Yin Ruosheng laughed dryly, "This kind of thing is not that serious, I'm just worried that your trip will be in vain."

"Then in order not to let me go in vain, let's go together?"

"Oh."

Yin Ruosheng subconsciously agreed, but immediately remembered that he had other important things to do, and quickly shook his head, "I can't do it today, I'm in a hurry, I'm really sorry, if I'm late, I won't be able to make it, I have to go."

"OK then."

Yin Ruosheng said again, "Bye bye", didn't care to say anything more, and left in a hurry with a pair of long legs, leaving Yin Feng alone on the spot, watching Yin Ruosheng hurriedly The slim and graceful figure who left had a complex look in her eyes, and then she also left.

As soon as Yin Ruosheng left Jiangnan University, he hurried to the nearby Polytechnic University.

She came out quite early, I checked online, the course is half an hour earlier than his mathematics and computer department, although Yin Feng delayed her, she should be able to catch up...

　I know what everyone is going to say, and you will see the effect soon...

　　
　
(End of this chapter)