Liu Lang swaggered into the library, and the various national teams that were talking to each other just now immediately fell silent, and everyone's focus was on the youngest child.

Liu Lang looked at Joseph in the distance, and it happened that the other party also cast a gaze at him, the two met their eyes, Joseph hurriedly turned his head, and he was faintly afraid of the other party in his heart.

It's not that he is really afraid of Liu Lang, but he was ashamed to sarcastically mock the other party before, but the other party slapped him in the face with practical actions, if this matter spreads, I am afraid that his Joseph's name will become a laughing stock.

Joseph actually admitted that the opponent was stronger than his own teammates, and it was not a little bit stronger, this is not a level of competition at all!

Not only Joseph, Liu Lang looked around at those players with his still immature face, no one dared to look at him, only Tao Xuanzhe waved his hand at him, and only those present did not have much fear and jealousy in the eyes of adults in his heart, otherwise he could become a world-famous mathematician in the future, not only to have talent, but also to have a "pure heart".

"Only you can enter my sight!"

This is Liu Lang's evaluation of Tao Xuanzhe, this is already a very high evaluation, and the others can't even reach the halfway up the mountain!

"Ladies and gentlemen, today is the final, no matter who it is, whether he can win the final championship or not, all of them are outstanding talents, and your future is bright, so I hope that all the young players will put down their burdens and show all their strength!"

Gutierrez, the secretary general of the organizing committee, made a short speech.

"Alright, let's go to the venue!"

There are only six players in the physics finals, except for these few people, the others go to the second floor to rest, after all, a final is only half an hour, and all the games will end in two hours, so the players of the other two subjects have also arrived here in advance.

Liu Lang was the first to walk through the detection door into the venue, and the other players were far away from him to "pay attention" to him.

The moment Liu Lang stepped into the arena, he suddenly took out a piece of chocolate from his pocket, opened the package and put it in his mouth.

"Well, it's really a bit of a gambling king!"

The players in the back saw that Liu Lang was eating, and looked back at their respective team leaders one by one: This is a violation!

As a result, the team leaders of their respective countries waved their hands and signaled the team members to leave their minds and hurry into the examination room!

They had received a notice from the organizing committee in advance to allow Liu Lang to eat something during the competition, although they were dissatisfied, but there was no way, out of sight was clean.

"Hmph, so arrogant at a young age! I'll make you cry in a while!"

Horton, who was standing in the distance, looked at Liu Lang and said secretly in his heart, he didn't believe that Liu Lang could answer that question.

The six candidates sat down, and soon the paper was in their hands, and there were only two questions on the paper, the first question was about a problem about the change of an object in motion in an electromagnetic field, and the theory involved was very complex, including magnetism, gravity, friction, and the pull and thrust between several objects.

Although this question is complicated, there is no problem for Liu Lang, and it can be solved within five minutes.

"Well, this second question turned out to be this thought experiment!"

Liu Lang was slightly surprised when he saw the second question, why did this question appear on the test paper of the juvenile group?

The question goes like this:

First of all, before the title, he expounded the basic theory of quantum mechanics, that is, the principle of inaccuracy, what is the principle of inaccuracy? At the microscopic scale, it is impossible to know the position of a particle and its velocity at the same time, and this principle of uncertainty is also a theory that has been proven, and there is no doubt that this is one of the conditions.

The second condition is the theory of relativity, when the object moves, it will cause the generation of relative time, that is, there is a slight gap between the time of the object itself and the time of the observer, the faster the object moves, the slower the time for the observer, if the speed of light is reached, the object is in a state of time standstill in the observer's time category.

The above are the two prerequisites, and then the topic is like this:

Some people questioned this principle of inaccuracy, and wrote a thought experiment, saying that there is a box with a small hole on one side, and there is a baffle at the mouth of the hole, and a mechanical clock that can control the switch of the baffle is placed in it, and the small box contains a certain amount of radiant material, and this clock can open the small hole at a certain time and release a photon, so that the time it runs out can be accurately measured, and at the same time, the locket is suspended on the spring scale, and the mass reduced by the locket, that is, the mass of the photon, can be measured, and then the energy loss can be obtained by using the mass-energy relationship E=mc2, so that the time and energy are measured at the same timeThis shows that the uncertainty relationship is not valid, and the view of the quantum mechanics school is incorrect.

The question is completed, and then the question is asked, and the contestants are asked to prove the thought experiment wrong with the two conditions given.

Liu Lang has participated in many physics trainings, but has never talked about quantum mechanics and relativity, only students majoring in physics at Huaxia University will involve the knowledge of these two theories, and there is not a lot of research, after all, the domestic research in these two fields is still in a blank stage, and there is not much practical value.

It can be said that if there is another Chinese player participating in the competition, then he will be confused, even if he is given two conditions, he will not be able to understand the meaning of these theories in just 40 minutes, and besides, even if he understands the meaning, he will be able to solve these two questions?

This is not an ordinary question, but a question that is called the "light box test" when you face off between Einstein, the founder of general relativity, and Bohr, the grandmaster of quantum mechanics.

At that time, Einstein was very disgusted with the principle of inaccuracy, thinking that this principle violated the harmonious order of the universe, so he always tried every means to overturn this theory, so he designed this "light box test" to prove that photons can be measured accurately, of course, this is a "thought test", not through real measurement to prove, because at the quantum scale, the measurement tool itself is a big problem, so the "thought test" is only logical thinking, as long as it is logical, then it is considered correct.

As for the great controversy of the century, which appeared repeatedly in the relevant books more than 20 years later, Liu Lang, as a good reader, has certainly read the relevant books, and is very yearning for the wonderful debate and duel between these two masters.

But it was only more than 20 years later in the highly developed Internet age that this controversy was widely disseminated, and in this closed era, no one except professionals would have access to this knowledge, let alone a group of thirteen or fourteen-year-old students.

"How did you come up with such a question? But it's too easy for me!"