Liu Lang was very puzzled why the organizing committee would take the question of this light box experiment, but he himself didn't need to think about it at all!

The answer is this: after the photon escapes, the mass of the locket hanging on the spring scale becomes lighter, and then the balance relationship is destroyed, so the locket begins to move, according to the preconditions, if the locket moves, the time between it and the mechanical clock will change relatively, so that the time read out by the mechanical clock on the locket will change because of the photon's run, in other words, with this device, if the energy of the photon is to be measured, it is not possible to precisely control the moment of the photon's escape, therefore, the thought experiment introduces the uncertainty relationship between energy and time！

The answer is simple, and the logic is perfect, but Einstein's question stumped Bol back then, and it took Bol a full day to come up with it.

But Liu Lang only took a minute to write the answer, which was originally a difficult question for Liu Lang by Horton, but now it has become a question for sending points.

"This question is so simple, so simple that you don't even need to think about it, but it saves chocolate!"

Liu Lang looked at the others with a relaxed look.

Liu Lang is simple, and the other players are unlucky, even the American players know some knowledge of relativity and quantum mechanics is confused, unless someone like Liu Lang has seen this question, otherwise no one will be able to write the answer in a short time.

Ten minutes later, Liu Lang stretched his waist, and then slowly stood up.

"Done?"

Everyone's eyes were focused on Liu Lang again.

"Huh?"

Horton had been sitting outside the examination room, and he felt a little unbelievable when he saw Liu Lang standing up so quickly and handing in the paper, could he have answered that question correctly? How could he have answered it? No, he must have given up because he couldn't understand this question at all.

Seeing Liu Lang handing over the papers, two staff members in the examination room hurriedly came over and sealed the papers step by step, but before they could be sent out of the examination room, another contestant stood up.

"I'm done too!"

Everyone looked at the man, it was an American athlete, who was 1.7 meters tall, taller than some adults.

"Okay, great!"

Horton is very happy that the American team is fighting this time, and it is not in vain that he has put in a lot of effort.

"Oh, yes, yes, there is finally someone who can compete with Liu Lang in terms of answering speed, it's really rare!"

The staff breathed a sigh of relief at this time, and it seemed that someone could finally catch up with Liu Lang's pace.

Liu Lang didn't care, that question is difficult to say, easy to say, if he doesn't know the beginning and end of this controversy, he will definitely not be able to answer it, and the contestants who can answer this question must have learned about this controversy before.

It's a big deal that we're tied for first place, or we're going to play again.

Liu Lang only cares about whether he can win, as for others, he doesn't care, it's someone else's business that they have the ability, what does it have to do with him.

"Liu Lang, I will also win the championship in this physics exam!"

Walking to the door, the American player whispered to Liu Lang, obviously the other party was also holding his breath and regarded Liu Lang as his target.

"Oh!"

Liu Lang didn't look at the other party at all, took out a piece of chocolate and stuffed it into his mouth, and walked out without looking back.

"You're .........!"

The American player couldn't be angry.

Liu Lang went to the second floor to rest under the leadership of Lu Mingzhi and several teachers, and there was a chemistry exam for a while, and the most important thing was to recuperate.

The two volumes were sent to the third floor, and as soon as the staff arrived upstairs, Professor Ding Huaizhong walked up to inquire.

"Liu Lang finished answering?"

"That's right, Liu Lang was the first to finish answering, but this time the American player Leonard also followed closely and handed in the paper, and the two took almost the same amount of time!"

"Quick, give me the roll!"

Professor Ding Huaizhong took out the scroll under the gaze of several people, and laughed at it just casually.

"Look, both questions are correct, and they are the standard answers......... I can't think of it! Liu Lang can also answer this question, it's really rare, it's so rare!"

"Amazing, how did this Liu Lang come up with this question?"

Others were surprised.

"Leonard's exam paper is also a perfect score!"

At this time, an American professor said loudly with a scroll in his mouth, with a hint of pride in his tone.

All the professors didn't believe that anyone could make this question in just ten minutes without understanding the controversy, at least the American player Leonard must have known, but Liu Lang, they didn't dare to be sure, if he hadn't read the question and it really took him ten minutes to come up with the answer, then his logical thinking ability was too strong.

If he has seen some of the circumstances of that great controversy, it means that Liu Lang's knowledge reserve is also very rich, he is only four years old, and he is still in a backward country like China, even a physics professor in his forties and fifties may not be able to understand the beginning and end of this controversy.

The happiest is still Ding Huaizhong, whether it is Liu Lang who came up with it on the spot or he has seen this question before, in short, now Liu Lang has won the championship of the physics competition, even if the American player also got a full score, it is also a tie for the championship, the Chinese team can do this, it is not easy, he is deeply happy for China.

"How's the two of them doing?"

Horton also walked up at this moment.

"Both of them answered with perfect marks!"

An Olympic Committee official replied.

"What? That Liu Lang also got a perfect score?"

"That's right, he got a perfect score, too. ”

The other party replied.

"Show me the papers!"

Horton really didn't believe that Liu Lang could make the right answer.

"Look at it!"

Ding Huaizhong handed Liu Lang's roll to the other party.

"This .........!"

Exactly like the standard answer, without any flaws.

"What about Mr. Houghton, have you been disappointed!"

Ding Huaizhong smiled coldly.

"Disappointed? What am I disappointed, I'm very happy, it seems that Liu Lang is indeed a genius, and his knowledge reserve is also very strong, I think Professor Ding can accept him as a student, such a genius is very difficult to find!"

At this moment, Horton had nothing to say.

"Don't worry, if Liu Lang really likes physics, I will definitely accept him as a student, and I believe that as long as he becomes my student, he will definitely win the Nobel Prize in the future!"

Ding Huaizhong said categorically.

"Okay, I believe Professor Ding has this ability!"

Horton finished speaking and turned to leave.

"This Liu Lang is doing well! There are two more subjects in the future, chemistry, there shouldn't be much of a problem, but the math problem is more difficult than physics, I don't know if Liu Lang can do it!"

In the physics exam, except for Liu Lang and the American player who submitted the paper in advance, everyone else handed in the paper after the bell rang, and the scoring work ended quickly, a total of twelve people, Liu Lang and Leonard were full marks, and the other three students answered a question correctly, but no one could answer the question of the "light box test".