at this time,

Xu Mang stood in front of the podium, glanced at the professor beside him, and asked cautiously, "What am I talking about?"

"Tell me whatever you want." The professor said, "Talk about your views on relativity and quantum mechanics, and by the way, tell us about your future direction."

"what?"

"So many?" Xu Mang shrank his head, thought for a while, and said, "Let me just talk about the information conservation problem of black holes that I discovered recently, which happens to involve quantum mechanics and the theory of relativity."

"Yes!" The professor nodded in satisfaction.

after that,

It was Xu Mang's solo performance.

"Hello students!"

"My name is Xu Mang, and I'm from Fuda." Xu Mang smiled slightly, "I'm very glad to meet you here, actually... I came here with my girlfriend, who is the representative of Shanghai in the mathematics competition for college students." team member and captain."

"of course."

"My math ability is not bad. The reason why I am not included this time is because I was recommended." Xu Mang said with a smile, "Let's not talk about it. Next, I will talk about my recent discovery, about Hawking radiation. The problem."

"This is a kind of black hole thermal radiation speculated by the theory of quantum effects. It was proposed by physicist Professor Hawking, but there are many problems with this concept. The first is the problem of information conservation."

"Information conservation is..."

Xu Mang started his lecture, from Hawking radiation to the conservation of information, from the law of entropy to the relationship between matter and information, trying to use simple and easy-to-understand rhetoric, introducing the concept that information conservation is the basic law of the universe.

then,

At the right time, I mentioned my theory that information conservation is the basic law of the universe: the mystery of lost information.

The students present were stunned for a moment, and many contents were completely beyond their comprehension, such as the concept of information entropy.

The information is abstracted and described for the first time, and has a very complete formula Hx EIxi E og2, 1PxiPxiog2, Pxii1, 2, ..n

Faced with this formula,

Almost all of them chose to resign.

Then came the theory of cosmic entropy.

The explanation given by Xu Mang is that entropy is actually a spontaneous development direction in nature, from orderly to disorderly, from low entropy to high entropy, that is, dSdS2-dS1 is greater than 0.

In physics, it can be simply understood as the magnitude of the degree of chaos.

The students were stunned again...retired again.

at this time,

A naughty classmate raised his hand and asked Xu Mang, "Xu..."

"Call me by name."

"Xu Mang." The classmate said, "Since we are talking about black holes, can you tell me what kind of changes you will find if you fall into a black hole?"

inside the black hole,

This is a very magical and weird existence.

When Xu Mang was studying the problem of black hole information conservation, he also studied the problem inside the black hole.

"This classmate is a bit naughty!" Xu Mang smiled, "This is a big problem for me!"

words fell,

The students smiled knowingly. It seemed that even Xu Mang, Xu Dashen, had problems that he didn't know about.

"Fortunately, I studied the interior of black holes by the way." Xu Mang said with a smile, "I'll just say it roughly, if you understand it or not, it doesn't matter what I do."

"???"

"???"

"???"

Really Almighty?

This... this is not a joke, is it?

however,

Xu Mang wasn't joking, but came straight to the point.

"A black hole has three physical parameters, its mass, angular momentum, and charge." Xu Mang said: "The mass determines the size of a black hole. Angular momentum is the physical quantity of any rotating object. If it does not rotate, it is equal to zero. Charge should understand?"

"Based on rotation and charge, there are four types of black holes." Xu Mang said, "The interior of each type of black hole is different."

"Due to time constraints, I will talk about Schwarzschild black holes, which are uncharged and non-rotating black holes." Xu Mang said, "This kind of black hole has only one parameter...mass. Next, let's throw the students who asked the question to the edge of the black hole and let He's approaching a black hole."

"Then we can see that the closer he is to the black hole, the slower his speed is. According to the general theory of relativity, this is because space-time is distorted and the passage of time slows down." Xu Mang continued: "And this classmate will become more and more popular, The frequency of light is distorted lower and lower over time."

"Then...this student reached the infinite redshift plane, where the frequency of light can no longer be reduced, and then he will be stretched by the tidal force, and will be torn apart if it exceeds a certain critical value." Xu Mang paused for a moment: "If you're lucky...this student didn't get torn apart, but flew over the red-shift surface, there will be two situations."

"From the perspective of quantum mechanics, he will encounter a wall of fire and be burned until there is no slag left. But from the perspective of general relativity, this student will go to the singularity of the black hole and be torn apart." Xu Mang said.

words fell,

Xu Mang glanced at his classmates and felt that they were listening to the bible at this moment, just like he was in English class in high school.

Xu Mang sighed: "Next time, don't ask random questions. I don't feel any pressure at all, but you tend to be autistic."

"..."

"..."

"..."

indeed,

The students have shut themselves down.

I wanted to ask other questions at first, but now it seems that even if I asked, it would be useless, because I don’t understand.

"Cough cough!"

"It's wonderful." The professor walked to the side helplessly, and said to the students, "Actually, theoretical physics is quite simple. Let's see how well Xu Mang learns it."

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