The existence that only Yuan Chenfei can see is naturally Mystra.
Only this time, its light and shadow became more condensed. It was no longer just a human figure, but had a nose and eyes, and it was closer to a real person.
It feels like the fifty-cent special effects have been upgraded to the one-dollar special effects, and the effect is roughly the same as that of the third-rate network.
Mystra replied: "Your progress makes the gods happy. We found that although the evolutionary ability of human beings is weak, their understanding and creative abilities are very strong. So the gods also want to see your understanding of this universe. , what step has it taken.”
"I thought you were here to ban the spread." Yuan Chenfei said.
Mystra spread her hands: "There is no need. The gods never prohibit the spread of any knowledge, because in the eyes of the gods, it is inferior."
"Understand, just like the omniscient clan pursues the unified theory of the universe, while the gods only pursue thoughts and feelings."
Mystra replied: "You don't know what the gods are pursuing. The gods limit the rules to reveal them just to make everything more consistent with the existing order, but the order does not exclude accidents, such as you. There must always be some variables. For more than 10,000 years, Apocalypse has created countless outsiders, seeking the ultimate manifestation of that variable."
Although everyone couldn't see Mystra, they could still hear his voice. When they heard this, they were a little confused for a moment.
"But if that's the case, then what I understand now may not have been understood by anyone before. Why hasn't it been spread?" Yuan Chenfei asked.
"You can explain it, but they may not be able to understand, appreciate, and apply it. There is a long distance from theory to implementation. Things that are not your own are ultimately difficult to master. But if any of them can gain it through this teaching We will not object to promotion. Everything will be arranged by itself."
This statement is quite metaphysical.
Mystra said again: "Okay, now you can express your feelings."
Yuan Chenfei smiled bitterly: "Now I really feel like I have returned to my student days, and I have the feeling of telling my thesis in front of the professor."
"I will not let you graduate." Mystra replied, and then she said nothing more. It was like a professor sitting there, listening carefully.
Yuan Chenfei said: "Well, if that's the case, then I'll say it. Feiyu, do you remember what I told you before? If you want to break through space, you must understand the existence of the fourth dimension."
Han Feiyu nodded.
Yuan Chenfei: "Then we must first know what the fourth dimension is."
"Is it time?" Qu Wei asked.
"No." Yuan Chenfei shook his head: "It's a parallel space."
"Parallel space? Isn't that the sixth dimension?" Xia Ning has obviously seen superstring theory.
"Are you saying that there are really countless worlds like ours, with countless identical versions of us in them?" Rouwa understood the parallel space from the comics.
Yuan Chenfei shook his head: "That's not the case. Parallel space, what is parallel is space, not the matter in space. You, me, us existences are all matter in space."
Yuan Chenfei took out a piece of white paper: "We assume that this paper is space, and there is a group of microorganisms on the paper that exist on a two-dimensional level. In their field of vision, the world is flat."
Then Yuan Chenfei took out a stack of white paper of the same size and covered it with the first piece of paper.
Yuan Chenfei said: "Now you can see that with the accumulation of a large amount of white paper, the two dimensions have been extended to the third dimension. And all these white papers are spaces, but there are no microorganisms in the two-dimensional world on these papers."
Xia Ning understood: "Parallel space. Parallel is space, not matter."
When countless white papers are stacked together, those white papers are the parallel spaces of the first paper.
"That's right. It's the same from three to four dimensions. In a four-dimensional space, all three-dimensional spaces are wrapped. What's parallel is space, not matter. So parallel spaces exist, but there won't be another Rowa or another. Xia Ning, another Yuan Chenfei. But on the other hand, there may also be life in those parallel spaces. For example, the Elf World, the Flower God World, and the Blue Sky World are located in these parallel spaces."
Li Zhanjun was surprised: "Are you saying that all alien races do not exist in the same universe as us, but in parallel spaces?"
Yuan Chenfei shook his head: "No, parallel spaces are the same universe."
No one could understand this again.
Yuan Chenfei pointed to the stack of white paper: "This is the universe! The first piece of paper lives on microorganisms representing the earth. The second piece of paper lives on microorganisms representing the elves and flower gods. These microorganisms are not Not existing on the same plane, but existing in the same three-dimensional space.”
Liu Li also understood: "From a third-dimensional perspective, we are indeed still in the same universe, but from a fourth-dimensional perspective, we belong to different spaces."
"That's right." Yuan Chenfei finally agreed this time.
He spread out all the papers again: "For a two-dimensional creature, the world in its eyes is like this. No matter what the three dimensions formed by stacking these papers together, it cannot feel it. What it can see It’s all these blank sheets of paper spread out on a two-dimensional level.”
This time it was Qu Wei who explained: "It's like a globe made into a map."
"Yes. It is now known that the observable diameter of the universe is 93 billion light-years, but this is viewed from a three-dimensional perspective, just like in the eyes of two-dimensional creatures..." Yuan Chenfei pointed to the large amount of white paper spread out. : "The world is flat and therefore huge. But if you look at it from a four-dimensional perspective, maybe the universe is not that big at all."
He put all the papers back together.
A piece of white paper that originally occupied a huge area disappeared.
From a three-dimensional perspective, this is just the area of an A4 paper times the thickness of the paper.
But as Yuan Chenfei said, when these papers are spread out in two dimensions, they can cover a large area.
So, the real universe is much smaller than everyone thinks? Is it just because humans understand it in a reduced dimension, like a globe reduced to a map, that it creates a sense of boundless space
In other words, all parallel spaces are viewed from the same three-dimensional perspective - the space is tiled.
Yuan Chenfei picked up another piece of paper, drew a black dot on each of the two positions on it, and then folded it in half so that the black dots coincided exactly.
He said: "When this paper is stacked together, from our perspective, the distance between the two black spots is only 1 micron. Suppose there is a two-dimensional creature on this paper, because it cannot move upward. So it has to go from one black point to another. The only way is to walk along the paper until it reaches the fold of the paper, and then continue walking back along the connecting point until it reaches the goal. position, thus completing the migration from one black spot to another. For this microorganism, the distance between the two black spots is not 1 micron, but ten centimeters."
Yuan Chenfei poked at the black spots: "Break the space and connect them."
Qin Wei nodded: "We all understand this truth. This is how the wormhole theory came about."
Qu Wei shook his head: "It's different. The theory of wormholes has always been based on thin channels of space and time, which are considered to be random. As for the idea of folding space, it is even more fallacious. It is equivalent to using a more difficult behavior to Replace low-difficulty behaviors. Imagine if even space can be folded, what else do you need to consider about teleportation? The entire space is under control. But if the four-dimensional space itself is a parallel space and has connectivity itself, then things will be simple. . There is no need for so-called wormholes and folding to enter and exit parallel spaces, because they are interconnected. It’s just that we can’t walk through it, just like two-dimensional creatures can’t jump directly to the upper level. This is not a problem of digging holes, but of itself. The issue of mobility. Isn’t it ridiculous that a two-dimensional creature that can’t even jump from one piece of paper to another wants to fold paper space?”
Yuan Chenfei smiled and said: "That's right. Therefore, three-dimensional space transmission does not require wormholes at all. There are no wormholes and no folding space, because space is folded. We only need to be able to get out of the limitations of the four-dimensional space and learn how to Just jump. The current gate to another world is actually a four-dimensional bridge, just like building a bridge directly between the two black spots on the paper so that two-dimensional creatures can climb over."
Xia Ning also understood: "So this is why one's own breakthrough can achieve spatial teleportation. Perceiving the four dimensions and walking in parallel space, you can instantly reach the place you want to reach."
Yuan Chenfei added: "The premise is that there is indeed four-dimensional communication between the target points."
Yuan Chenfei drew a black dot on a piece of paper, and then drew a black dot on another piece of paper, one at the top and one at the bottom.
He said: "Now you can see that if there are two flat black spots like this, even in three-dimensional space, there is still a long distance. If a two-dimensional creature wants to 'jump' over, it also has to go through a long journey."
With that said, everyone understands.
The four-dimensional space is not unlimited in that it can span all distances. It can also be divided into far and near.
Let's take the two-dimensional creature as an example. Now if this two-dimensional creature wants to go from one black spot to another, it must crawl across countless pages of paper.
Previously it only had to climb ten centimeters, but now it may have to climb several meters to reach it.
"So, the farther away the three-dimensional space is, the farther the four-dimensional distance may be?" Han Feiyu asked.
"Yes, but not entirely." Yuan Chenfei folded a piece of white paper again, drew a black dot on one end of the paper, and then drew another black dot on the opposite side near the fold.
He held up the paper: "You see now, these are two black spots that do not overlap after being folded in half. In three-dimensional space, the distance between these two black spots has increased from 1 micron to one centimeter. But in the eyes of two-dimensional creatures , the distance it has to crawl is actually shorter, because this black spot is close to the edge area, which means it only needs to crawl two-thirds of the distance, which is six or seven centimeters, to reach it."
Therefore, the distance on the three-dimensional level does not absolutely represent the distance on the two-dimensional level.
By analogy, the four-dimensional space should be the same.
But no matter what, if you can jump to the fourth dimension, the distance you can travel will definitely be much shorter than that of the third dimension.
"Then how to tell the difference?" everyone asked.
Yuan Chenfei replied: "If you want to walk in front of a mountain, you must first be able to see it."
The topic returned to the original result.
If you want to be able to use the fourth-dimensional parallel space for teleportation, you must first be able to perceive the overall four-dimensional existence, at least the four-dimensional state of this area, so that you can know how to get there.