Liu Lang swaggered into the library. The various national teams that had been talking to each other just now fell silent. Everyone's focus was on this smallest child.
Liu Lang looked at Joseph in the distance, and the other person happened to cast his gaze towards him. Their eyes met, and Joseph quickly turned his head, feeling faintly afraid of the other person in his heart.
It's not that he is really afraid of Liu Lang, but he was sarcastic before, but the other party slapped him hard on the face with actual actions. If this matter spreads, I'm afraid his name Joseph will be
Become a laughing stock.
By thinking this way, Joseph actually admitted that the opponent was stronger than his own team members, and not even a little bit stronger. This was not a competition at the same level at all!
Not just Joseph, Liu Lang looked around at the players with his immature face. No one dared to look at him. Only Tao Xuanzhe waved his hand to him. He was the only one present who didn't have much fear and jealousy in the eyes of adults.
Otherwise, he can become a world-famous mathematician in the future. Not only must he have talent, but he must also have an "innocent heart."
"Of the people present, only you can enter my sight!"
This is Liu Lang's evaluation of Tao Xuanzhe. This is already a very high evaluation. Others! They can't even reach halfway up the mountain!
"Fellow contestants, today is the final. No matter who it is, no matter whether he can win the final championship or not, those who can reach this point are all outstanding talents. Your future is bright, so I hope that all the young contestants
Put down your baggage and show all your strengths!"
Gutierrez, Secretary-General of the organizing committee, made a short speech.
"Okay, everyone, let's enter the venue!"
There are only six contestants in the physics finals. Except for these few people, the others went to the second floor to rest. After all, the final time is only half an hour, and all competitions will be over in two hours, so the contestants from the other two subjects also
They all got here early.
Liu Lang was the first to pass through the inspection gate and enter the venue. The other contestants stood far away from him and paid him "attention".
The moment Liu Lang entered the arena, he suddenly took out a piece of chocolate from his pocket, opened the packaging and put it into his mouth.
"Well, I really feel like a gambling king!"
When the players at the back saw Liu Lang actually eating, they all looked back at their respective team leaders: This is a violation!
As a result, the team leaders from their respective countries waved their hands, telling the team members to mind their own business and quickly enter the examination room!
They had received a notice from the organizing committee in advance, allowing Liu Lang to eat something during the competition. Although they were dissatisfied, there was nothing they could do about it.
"Humph, you are so arrogant at such a young age! I will make you cry in a while!"
Standing in the distance, Holden looked at Liu Lang and thought to himself, he didn't believe Liu Lang could answer that question.
The six candidates sat down, and the papers were soon handed to them. There were only two questions on the paper. The first question was about the change of an object moving in an electromagnetic field. The theories involved were very complicated, including magnetism, gravity,
Friction and the pull and push forces between several objects.
Although this question is complicated, it is no problem for Liu Lang and he can answer it in five minutes.
"Well, this second question turns 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 for the youth group?
The question is this:
First of all, before the question, I elaborated on the basic theory of quantum mechanics, which is the uncertainty principle. What is the uncertainty principle? Just at the microscopic scale, it is impossible to know the position and speed of a particle at the same time. This is uncertain.
The principle is also a theory that has been proven. There is no doubt that this is one of the conditions.
The second condition is the theory of relativity. When an object moves, relative time will be generated, that is, there is a slight gap between the object's own time and the observer's time. The faster the object moves, the slower the observer's time will be. If
Reaching the speed of light, the object is in a state of time rest in the observer's time domain.
The above are the two prerequisites, and then the question is like this:
Someone questioned this uncertainty principle and wrote a thought experiment, saying that there is a box with a small hole on one side, a baffle at the hole, and a mechanical clock that can control the switch of the baffle.
There is a certain amount of radioactive material in the box. This clock can open the small hole at a certain moment and release a photon. In this way, the time it escapes can be
It is accurately measured. At the same time, the small box is suspended on the spring balance. The mass reduced by the small box, that is, the mass of the photon, can be measured. Then the energy loss can be obtained by using the mass-energy relationship E = mc2. In this way, time
and energy are measured accurately at the same time, which shows that the uncertainty relationship is not established and the view of the quantum mechanics school is wrong.
After the topic is completed, the next step is to ask the contestants to use the two conditions given to prove that this thought experiment is wrong.
Liu Lang has participated in many physics trainings, but has never taught relevant knowledge about quantum mechanics and relativity. Only students majoring in physics at Huaxia University will be involved in the knowledge of these two theories, and there is not much research on them. After all, now
Domestic research on these two fields is still at a blank stage and has little practical value.
It can be said that if there is another Chinese player participating in the competition now, he will be confused. Even if two conditions are given, he will not be able to understand the meaning of these theories in just forty minutes. Besides, even if
Can we answer these two questions once we understand the meaning? It is simply impossible.
This question is not an ordinary question, but a question called the "light box test" when there is a duel between Einstein, the founder of general relativity, and Bohr, the master of quantum mechanics.
At that time, Einstein was very disgusted with the uncertainty principle. He believed 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
The measurement is accurate. Of course, this is a "thought experiment" and is not proved by real measurement, because at the quantum scale, the measurement tool itself is a big problem, so the "thought experiment" is only logical thinking.
, as long as it is logical, then it is considered correct.
The great debate of the century has repeatedly appeared in related books more than 20 years later. As a well-read person, Liu Lang has of course read the relevant books and is very interested in the wonderful debates and duels between the two masters.
yearning.
But it would be more than 20 years later in the Internet age with highly developed information that this debate would be widely disseminated. In this closed era, unless they are professionals, others will not have access to this knowledge at all, let alone
It's said to be a group of thirteen or fourteen-year-old students.
"Why is there such a question? However, it is too easy for me!"