"The basic assumption of the theory of relativity is the principle of relativity, i.e., that the laws of physics and the choice of frame of reference are non-existent

Close. The difference between special relativity and general relativity is that the former discusses the laws of physics between frames of reference for uniform linear motion, while the latter generalizes to frames of reference with acceleration and is widely used in gravitational fields under the assumption of the equivalence principle. The theory of relativity and quantum mechanics are the two fundamental pillars of modern physics. Classical mechanics, which is the foundation of classical physics, is not applicable to objects moving at high speed and in the microscopic realm. The theory of relativity solves the problem of high-speed motion, and quantum mechanics solves the problem under microscopic subatomic conditions. The theory of relativity subverts the common sense concept of the universe and nature, and proposes new concepts such as the relativity of time and space, four-dimensional space-time, and curved space. The special theory of relativity was proposed in 1905, and the general theory of relativity was proposed in 1915.

Since Newton's laws pose a difficulty to the special theory of relativity, i.e., any object in any position in space is subject to force. Therefore, there are no inertial observers in the entire universe. In order to solve this problem, Einstein proposed the general theory of relativity.

The most well-known corollary of special relativity is the mass-energy formula, which states that mass increases with increasing energy. It can also be used to explain the enormous amount of energy released by nuclear reactions, but it is not what led to the creation of the atomic bomb. Gravitational lensing and black holes, predicted by general relativity, are consistent with some astronomical observations.

According to the mass-energy equation, one can easily deduce that the speed of light is the fastest in the universe. Because, when an object reaches the speed of light, its mass will become infinite, which does not correspond to the facts. However, it has also been suggested that there are two kinds of universes, the fast universe and the slow universe. All elementary particles are faster than the speed of light in the fast universe, i.e., tachyons, and therefore, the matter they are composed of is also faster than the speed of light, and vice versa. In addition, astronomers have made astonishing observations of faster-than-light phenomena, including the speed at which galaxies are distancing, the speed at which quasars expand, and so on. However, so far none of the arguments are convincing, and none of the arguments have overturned the theory of relativity. ”

Chen Nan directly memorized the information on Baidu in one go.

I'll go, how is it a pair of bells and whistles on this TMD's Baidu data, such a big bunch of concepts like the Book of Heaven, I'm really convinced! Chen Nan complained secretly in his heart.

"I'm done!"

Be quiet!

After Chen Nan memorized it directly in one go, the classroom was quiet.

Everyone looked at Chen Nan in disbelief.

Even the physics teacher felt incredible.

This concept of relativity may not even be able to be said by himself like him, he is simply Einstein alive.

The physics teacher originally thought that Chen Nan would simply talk about the history of the theory of relativity, what the general content was, and who discovered it, and it would be over in a few words, but what he didn't expect was that Chen Nan actually told him completely in one go!

At this time, Zheng Jiayao felt that she was being splashed with water on her face.

"That's good! Chen Nan, it seems that your grades are not watery, I am optimistic about you!" the physics teacher praised.

Then, he looked at Zheng Jiayao again, his face became serious, and his tone became fierce: "Zheng Jiayao! Look at others! Look at you again! If you don't know it, you still have to insult others, you stinky student! If you cheat yourself, you will cheat, and you have to slander others, you are really cheap!"

"I ...... I ......" Zheng Jiayao felt full of wrongs at this time, "How can I have!"

"Where are you gone?"

"Don't believe it...... Unbelief...... If you don't believe me, I have a lot of right questions in my homework book, so I will show you if I don't believe me. ”

As she spoke, Zheng Jiayao took out her homework book as if she had found a life-saving straw.

"Less!" the physics teacher immediately refused, "How can you be sure that your homework is not copied?"

"I ......," Zheng Jiayao said.

"Teacher, you better take a look at her book, if she really copied it, you can check it, can't you?" At this time, Chen Nan said to the physics teacher.

"Well, bring it up. ”

"Okay!"

Zheng Jiayao picked up the physics workbook and walked to the podium.

"Give. She handed the notebook to the teacher.

Hum!

Then she looked arrogantly under the podium, as if to show off how much prestige she had.

"Huh?"

"Huh??"

"Uh-huh???"

The more the physics teacher flipped down, the more his brows wrinkled and his eyes widened.

Brush, brush, brush

"How about the teacher, don't you feel like I'm very good? Every page is a tick, are you surprised?" Zheng Jiayao, who thought that the physics teacher was very optimistic about herself, was complacent and asked the physics teacher at this time.

"yes, that's really good, it's really good. The physics teacher nodded slowly, but his tone seemed to be the opposite.

"It turns out that I haven't changed my homework for so many days, and there are students who can make such a look. ”

The physics teacher has been very busy lately, so he hasn't changed his homework in person for several weeks, and he usually asks his classmates to exchange books to change it, so he doesn't know how his classmates are doing.

"Thank you, teacher, for the compliment!"

Zheng Jiayao thought that the physics teacher was very happy with her excellent results.

Bang!

Suddenly, the physics teacher threw her notebook on her head with a thud.

"Are you embarrassed to show me this kind of homework?"

Zheng Jiayao was taken aback.

"What do you mean?"

"What do you mean? Do you look down on my students or do you think you're amazing?"

"What's wrong with me?" Zheng Jiayao suddenly looked dazed, why did this physics teacher suddenly change as a person.

"I don't want to explain, you take the notebook, go to the seat and stand for me, this week, every physics class will stand for me!" the physics teacher ordered angrily.

"Ah, why???" Zheng Jiayao was pale, she didn't know what the physics teacher was thinking, she was obviously right every time, why did this physics teacher suddenly get so angry when she read the right book?

"I don't want to explain, you give me back to my seat and stand!" the physics teacher yelled at Zheng Jiayao.

"Good...... All right. ”

Zheng Jiayao is really confused by the second monk now, and when she walked back to her position, she opened her homework book.

"Phew!"

As soon as she opened it, her whole body opened her mouth wide, her eyes widened, and she gasped.

"How...... How could it be...... How so?"

She looked at her homework book with trembling hands.

She saw that every page in the homework book was full of red crosses, and there were no ticks at all.

Whether it was the question she got right or the question she got wrong, it was all marked with a red cross.

What the hell is going on?

"Damn! What are you doing in the aisle! Hurry up and get me back to my place and stand!" the physics teacher roared.

"Teacher, listen to my explanation, it's not ......"

"You stand for me! I don't want to hear your explanation! I only care about your grades!" Before Zheng Jiayao could finish speaking, the physics teacher had already interrupted her.

"Good...... All right. ”

Chen Nan, I'll grass your mother!

Who else can you do but make the hell of this!

You must have stolen my notebook while I wasn't there!

"Next week is the mock test for the college entrance examination, if you give me a bad test, you will stand for me until I graduate!"

Hee-hee-hee-hee!

The corners of Chen Nan's mouth were slightly hooked, and he looked at Zheng Jiayao, who was full of dazed faces, and smiled weirdly.

After class......

Bang bang bang!

"Chen Nan!" Zheng Jiayao slapped Chen Nan's table.

Chen Nan was sleeping on the table, and when he heard the noise, he raised his head slightly impatiently, "Who, what are you doing, didn't you see me sleeping." ”

Bang bang bang!

"Sleep, sleep, I ask you, what qualifications do you have to say that I cheated to get points!"

"Yo, it's you. Hearing Zheng Jiayao's voice, Chen Nan rubbed his eyes, "My scalp is numb when you asked this question, you originally cheated, this is already a fact, why do you still want to ask me why?"

"Who told you that's true! I ask you, which eye did you see that I was cheating?"

"I don't rely on eyes, I rely on logic. ”

"Logic?"

"That's right. Chen Nan sat up, "You haven't been in the top ten every year, and suddenly you're in the top four this year, isn't it cheating?

"You're embarrassed to say, I ask you, my homework book is ......"

Chen Nan waved his hand and interrupted her, "Don't say anything, the mock exam will be next week, and you will know when the test comes out." ”

"Hmph! Let's see! I'd like to see if it's your luck to be the first place in your midterm exam, I think you can rely on your luck in such a strict mock exam!"