Vol 8 Chapter 139: First class

Following Mu Lin's self-introduction, Mu Lin returned to his seat. The 23rd class of senior high school will start daily learning tasks again after welcoming new members.
The morning classes are mostly theoretical knowledge courses. The 33rd class in senior high school where Mu Lin is located belongs to the science class. In daily learning, the knowledge of mathematics, physics and chemistry will be the main learning focus, and the subjects of language and humanities will be used as minor knowledge, and the learning is not deep.
The first class in the morning is physics. Mu Lin opened his book. Mu Lin had received a brand new textbook before he came to the classroom. Mu Lin saw the physics class, took the physics book out of the drawer, and wrote his name immediately. Then, instead of listening to the teacher's rants, he watched it for himself.
Dragon Ball World's technology is indeed ahead of Mu Lin's original world. From the physics textbook alone, Mu Lin can feel the gap between the two different worlds. Although Mu Lin's class at this time was only a high school, Mu Lin looked at the discussion about time and space in the books, and couldn't help but sigh that this was in the original world, and perhaps the university would not have learned this knowledge.
Originally Mu Lin had almost no understanding of this aspect, but after having the system, after competing with opponents like Hit, Mu Lin felt that his understanding of time and space was quite deep. Looking at the knowledge in the book at this time, Mu Lin found that they all seemed so one-sided. Looking at it, Mu Lin felt a little bored and turned his head out of the window unconsciously.
The physics teacher in Class 33 is an old man. He wears a pair of thick reading glasses and is dressed plainly, giving people a staid look. At this time, the physics teacher was talking about the one-way nature of time and the time paradox in class. Most of the students after class seemed to be interested in hearing this aspect. However, the physics teacher saw that Mulin in the corner turned his head out of the window, not listening to his lecture. So he said to Mu Lin, "That classmate near the window corner is the new classmate Mu Ling, right?"
Mu Lin heard the physics teacher calling himself, and then turned his head back, then stood up and said, "Yes, teacher. I am Mu Ling who is new to Class 33 of High School."
"I think you didn't seem to be very satisfied with my lecture when you first arrived. You have been looking out the window and seem not listening to my lecture." The physics teacher said slowly.
"Report to the teacher, I have been listening to your lectures. It's just that I think what the teacher said is not consistent with my perception, so I looked out the window a few times." Mu Lin said truthfully.
"Oh, what do you think about the one-way nature of time and the time paradox?" the physics teacher asked Mu Lin. At the same time, the students in the class immediately looked away. No one thought that Mu Lin had just come to this class and was named by the teacher for less than one class. At this time, Ma Feng sitting in front of Mu Lin lowered his voice and said to Mu Lin, "Mu Ling, you don't know a little bit, and then this teacher will not embarrass you. Although the physics teacher is old-fashioned, he still treats us quite well. of."
Mu Lin smiled when he heard Ma Feng's words, but still looked at the physics teacher and said, "I think time is an axis of continuous development, but there is still a way to go back to the past from the future. Because time is an axis A one-way axis, as long as there is enough energy to detach itself from this axis, then there is a chance to move forward. Just like our space is a three-dimensional space, if we compare time to the fourth dimension, then It belongs to the four-dimensional space. In the four-dimensional space, we cannot find a way back to the past. But once we have enough energy to escape from the four-dimensional space and reach the five-dimensional space. In that case, we who enter the five-dimensional space look towards The current world is as if we are now looking into a two-dimensional space. Going back to the past is just as simple as turning our body. In that case, time travel will become very simple. So the teacher said time One-wayness is not absolutely correct. As long as you are beyond the dimension of this world, time travel and space travel are possible."
Everyone in the class and the physics teacher watched Mu Lin talk a lot of words, saying that the way to travel through time is to go to a higher dimensional space. The classmates didn't know much about Mu Lin's words, only felt that Mu Lin seemed to be constantly talking nonsense. But the physics teacher was shocked. The physics teacher knew that when the world's most famous institutions were conceiving the method of time and space travel, the unified conclusion they reached was all high-dimensional travel. The reason why the physics teacher did not say this is because the practice of this kind of idea may be almost impossible. However, Mu Lin was able to put forward this view in the high school class at this time, which made the physics teacher take a deep look at Mu Lin.
"How can you determine whether the five-dimensional space really exists? Or is the five-dimensional space a place that humans can reach?" The physics teacher calmed down slightly and asked Mu Lin.
At this time, the people in the class also realized that the tone of the physics teacher asking Mu Lin at this time was no longer a question, but a tone of asking for advice. This couldn't help causing everyone in the class to start thinking about what Mu Lin just said.
"Just as the two-dimensional space that exists in the plane can never perceive the three-dimensional space, the space we are in is unable to observe the five-dimensional space. Because the five-dimensional space has exceeded the range that humans can understand. But since If you can’t understand and discover the five-dimensional space, then we can try to create a new dimension as we think. This may be the real function of the so-called time machine.
Mu Lin said.
Hearing Mulin's words, the physics teacher instantly realized the possibility of returning to the past from the future, like a divine initiation. "Mu Ling, sit down first. Let's talk about the time paradox next." The physics teacher took a deep look at Mu Ling, wanting to know how many unexpected things this student had in his mind. Something exists.
"Mu Ling's answer is very wonderful. Everyone, like Mu Ling, will enrich themselves outside of class. Then the teacher will want to talk about the paradox of time travel. The time paradox is also called grandmother. paradox……"
The physics teacher is ready to draw everyone's attention back to his class. But at this time the students had already turned their attention to Mu Lin sitting in the corner of the window. . ,,.