Han Shuo never expected that He Guangtian would ask himself a question about physics, Han Shuo knew that he was trying to win back a battle for his apprentice, but he calmly faced the battle, and he typed the following text on the keyboard: "Before the 20th century, no one had hinted that the universe was expanding or contracting, which is an interesting reflection of the thinking atmosphere at that time. It is generally believed that the universe has existed for an infinite time either in an unchanging state, or was created in a finitely long past in more or less as we see it today. This may be partly due to the tendency to believe in eternal truths, and also due to the comforting notion that the universe must be immortal and unchangeable, even though people are born and grow old, sickness and die. Even those who realized that Newton's theory of gravity made it impossible for the universe to stand still did not think of suggesting that the universe might be expanding. Instead, they tried to revise the theory so that gravity becomes repulsive at very large distances. This would not have a significant impact on the prediction of planetary motion, but would allow the distribution of an infinite number of stars to remain balanced - the attraction between neighboring stars is balanced by the repulsion between distant stars. ”

Han Shuo's answer caused quite a stir.

"What do you say? People think that the universe will not expand or shrink because people want the universe to be eternal, so people do not argue that it is not eternal? What kind of theory is this? Why does it sound so far-fetched? ”

"Upstairs, you think it's far-fetched, right? I don't think Shuo Ye's theory is far-fetched at all, and I also think that nothing is eternal, including the universe we live in. In fact, everyone has to say that the universe is eternal is just a psychological effect, just like Shuo Ye said, the concept that the universe must be immortal and unchanging can give people comfort. So. We don't argue about the expansion and contraction of the universe. ”

"The theory of the eternity of the universe that people have been clinging to for so many years is actually just an illusion caused by psychological effects in Han Shuo's opinion, this is really incredible, Han Shuo's thinking mode is really different from normal people, his thinking is too crazy!"

"Shuoye's theory is too good, I can't think of an adjective to describe it."

"Seeing Shuoye's answer, I was really stunned. Master, why are you so talented? How dare you think so? Your insights into physics are so unique that I don't believe there is a second person in the world who thinks like yours. ”

"Shuo Ye, you are so cool!"

Although netizens felt that Han Shuo's answer was too surprising, they actually felt that Han Shuo was reasonable, and expressed their support for his theory.

Netizens support Han Shuo so much, it stands to reason that He Guangtian should be depressed. But. He Guangtian saw Han Shuo answer like this, instead of being depressed, he was happy, since Han Shuo himself mentioned the problem of repulsion, then he would have to use the problem of repulsion to embarrass Han Shuo. So, He Guangtian asked another question: "Aite Han Shuo, since you also mentioned the problem of repulsion, then." I want to ask you, since there is such a thing as repulsion. So. Gravity and repulsion balance each other, and our universe will remain unchanged forever. ”

In fact, if Han Shuo hadn't taken the initiative to mention the word "repulsion", He Guangtian wouldn't have thought of this problem, but after Han Shuo said so. He immediately remembered such a thing as repulsion. In his previous understanding, the role of repulsion is to fight against gravity in order to maintain the balance of all things in the universe. And according to this statement, the universe should be eternal, which can just contradict Han Shuo's argument. Such. He didn't believe that Han Shuo could continue to insist on his opinion.

He Guangtian's questioning aroused a strong response from netizens.

"Yes, yes, Teacher Han Shuo, since there is repulsion, then, as soon as the repulsion and gravity are balanced, won't the stars fall together along a certain center point? Wouldn't the universe be eternal? Teacher Han Shuo, what is your explanation for this question? ”

"I think what Teacher He Guangtian said is reasonable, Han Shuo, you just said that people think that the universe is eternal only because people are unwilling to admit that the universe is not eternal from the bottom of their hearts. However, I feel that your statement is wrong, the universe is supposed to be eternal. Just like He Guangtian said, the gravitational and repulsive forces are balanced with each other, and our universe can remain unchanged forever. ”

"Teacher He Guangtian asked this question well, I feel that Han Shuo should not be able to answer it."

"Whoop! What is Repulsion? I've only heard of gravity, which was discovered by Newton. Who discovered Repulsion? Marton? ”

"Poof! It's so funny upstairs, Marton haha."

"To be honest, I don't know what repulsion is, but from their conversations, repulsion is the opposite of gravity. What Mr. He Guangtian means is that there is both repulsion and gravity in the universe, and as soon as these two forces are balanced together, the universe can maintain balance. ”

"I haven't even heard of what repulsion is, and Master Shuo is not a professional in physics, can he know what repulsion is? He shouldn't be stumped by He Guangtian's question, right? Suddenly, I feel worried about Shuoye! ”

"It's over, I feel that this question Shuo Ye may not be able to answer, alas"

"This question is indeed difficult enough, if Shuo Ye can answer it, then he is really a genius."

"Don't think about it, this question is so difficult, Han Shuo definitely can't answer it."

"Such a difficult question, even if Shuo Ye is a genius, he can't answer it!"

Netizens were all talking about the difficulty of the question He Guangtian had just raised, and they all thought that this question was too difficult for Han Shuo to answer. And He Guangtian himself thought so, he didn't believe that Han Shuo could answer this question.

However, what He Guangtian didn't expect was that Han Shuo directly refuted him without giving any face: "Hehe, I really didn't expect a dignified physics master to make such a mistake. In fact, this equilibrium is unstable, and if the stars in a certain area are slightly closer to each other, the gravitational pull will increase and exceed the repulsion force, so that the stars will continue to fall together. Conversely, if the stars in a region are slightly farther away from each other, the repulsive force plays a dominant role and drives them further apart. (To be continued......)