Xueba, I beg you to go and escort him quickly!

"Student Xu Heng, tell me?"

"Do you have any unique insights into the double-slit interference experiment?"

For them, even for scientists and physicists, discovering the laws of the world and explaining everything is what they pursue all their lives.

For example, Einstein, he has been working on the research of a grand unified theory in the second half of his life, which is the creed of almost all physicists.

That is, as the progress of human observation becomes more accurate and the scale becomes smaller and smaller, human beings are getting closer to the essence of the world, until the phenomenon of double-slit interference experiment shatters all physicists' pursuit of the essence of the world in one fell swoop. Dream.

Xu Heng, "In quantum mechanics, the double-slit experiment is an experiment that demonstrates the wave and particle properties of microscopic objects such as photons or electrons. The double-slit experiment is a dual-path experiment."

"In this broader experiment, microscopic objects can go through two paths at the same time or through any one of them, from the initial point to the final point."

"The distance difference between these two paths induces a phase shift in the quantum states that describe the physical behavior of microscopic objects, thus producing interference phenomena."

"Another common type of two-path experiment is the Mach-Zehnder interferometer experiment."

"..."

Xu Heng is like a treasure.

If the electrons move without interfering with each other, there will be two traces falling on the blackboard through the double slits.

If the electrons move in the form of waves, due to the interference between the waves, there will be traces falling on the blackboard through the double slits.

Initial experiments showed that electrons move in waves.Even if electrons are emitted one by one, there are still traces on the blackboard.

So scientists want to know why each electron emits waves, so they aim the high-speed camera at the double slits for observation.

Can--

When you want to observe further, the particles move without interfering with each other, passing through the double slits and falling on the blackboard are two traces!

Double slit experiment, a famous optical experiment, in 1807, Thomas Young summarized and published his "Lectures on Natural Philosophy", which summarized his work in optics, and described the double slit experiment for the first time in it: put A candle is placed in front of a piece of paper with a small hole in it, thus forming a point light source.

A light source emanating from a point.

Now put another piece of paper behind the paper, the difference is that two parallel slits are made on the second piece of paper.

The light emitted from the small hole passes through the two slits and is projected onto the screen, forming a series of alternating bright and dark fringes, which are now known as double-slit interference fringes.

There is nothing wrong with the experiment itself, which proves that light has wave-particle duality, but scientists want to observe clearly how this happens, so they observe at the microscopic level, setting up high-speed cameras, and observing how photons pass through the gap one by one to form wave interference, At this time, a magical thing appeared, and the characteristics of photon waves disappeared!

It became the easiest particle for human to understand again, and only two stripes appeared.This led to the super-terrible and weird electronic double-slit interference experiment and the earth-shattering "delayed choice experiment" later, which brought unprecedented ideological shocks to the entire human race.

Xu Heng is well aware of this, and he is even more clear. In layman’s terms, this experiment is: For example, your wife is about to give birth. If you don’t watch it, you will give birth to a big fat boy. But if you go to watch it, observe the whole birth process, then a monkey will be born.

To use another analogy, if you buy vegetables at the vegetable market tomorrow, if you go there tomorrow, there will be a vegetable market there, and if you don’t go tomorrow, there will be a bathing center there! Isn’t this scary enough?

For another example, you think you know the world behind you, but do you know that? The moment you turn around, the world behind you becomes the world you see. It is not like that in the second before you look of.

It's not that the world is here, but the moment you look at it, the world becomes the world you see.

This world is just what the Creator wants you to see, just an illusion.

"Aren't we paying too much attention to this horrific experiment in the scientific community?"

"Once this kind of thing is thought about carefully, the scope involved is very wide!"

"Everyone, if you talk about it with great enthusiasm, what will be delayed is the time for the examination paper group?"

Xu Heng understands and knows about the double-slit interference experiment. As for his personal views, given his height, it is difficult for him to give too many views.

In fact, at the height of his thinking, speaking out, for these people, is a blow to dimensionality reduction!

Don't talk about it!

Xu Heng brought the topic back to the real test questions for the postgraduate entrance examination. He himself was able to handle it with ease, but this made the professors and teachers who produced the papers suffer.

Fang Zhonggui, "Student Xu Heng is right, let's hurry up and see each other!"

"Time is running out! We only have five and a half days!"

"It's not enough!"

Five and a half days?

Not enough?

Xu Heng, "Uh..."

If it were Xu Heng himself, one day would be more than enough, but Fang Zhonggui was obviously helping himself by saying this!

Xu Heng smiled slightly, and gave Fang Zhonggui a thankful look.

But Fang Zhonggui said, "Student Xu Heng! If it were you who wrote the papers yourself, I absolutely believe in the quality and speed of your papers, but here is a whole paper team!"

"You saw what happened just now!"

"There are too many people, sometimes, there will still be differences!"

"Actually, the so-called release of papers is also a neutralization between our group of papers! Mutual coordination..."

Fang Zhonggui pulled Xu Heng aside and talked a lot.

Xu Heng smiled.

Although he knew all of this, Fang Zhonggui was kind, and Xu Heng did not refuse.

He listened carefully, and finally said, "Thank you!"

Fang Zhonggui looked at Xu Heng and took a deep breath, "Student Xu Heng, you despise everything in the mathematics competition and you are always at a disadvantage. Then... are you interested in the physics competition?"

Xu Heng waved his hand without any hesitation.

Fang Zhonggui was taken aback, "I'm talking about the International Physics Competition!"

Xu Heng still waved his hand.

Fang Zhonggui, "???"

Xu Heng, "The International Mathematical Olympiad has disappointed me to the core! Physics...what can I expect?"

"Professor Fang, do you think the topic of the International Physics Competition can interest me?"

Fang Zhonggui, "Student Xu Heng, why don't you give it a try?"

Xu Heng was taken aback for a moment, but then he understood.

Xu Heng's previous performance was too ostentatious.

There is a saying that a big tree attracts the wind!

Although some people agree on the surface and have smiles on their faces, in fact, who knows what they are thinking in their hearts?

Knowing the face but not the heart!

Fang Zhonggui did this to tell Xu Heng not to be too aggressive.

But he didn't want Xu Heng to know too much about the dark knowledge involved, so he found an excuse tactfully to let Xu Heng keep a low profile for the time being.

Xu Heng understood.

"Okay! Professor Fang, I'll just take a look at your topic and see if it makes me [-]% interested."

Xu Heng raised his eyebrows and looked at Fang Zhonggui.

Seeing what Xu Heng said, Fang Zhonggui was naturally delighted.

He is trying his best to protect Xu Heng!

He didn't want Xu Heng to be affected by the bad wind in this environment, so he wanted to protect Xu Heng as much as possible.

But actually, Xu Heng is so fragile?

He was just following Fang Zhonggui's plan.

Of course, Fang Zhonggui still had some small expectations for the international physics competition questions mentioned by Fang Zhonggui.

Fang Zhonggui hurriedly asked the question:

Place a spherical glass fish tank with a radius R in front of an upright plane mirror, the tank wall is very thin, and its center is 3R away from the mirror surface, and the tank is filled with water.

An observer in the distance looks at the fish tank through the direction perpendicular to the center of the sphere and the mirror.

A small fish swims along the tank wall with velocity V at the nearest point to the mirror.

Find the relative velocity of the two images of the fish seen by the observer.

The refractive index of water is n=4/3.

This question is very tricky!

Fang Zhonggui also gave two pictures.

In Fang Zhonggui's opinion, this question can delay a little time.

After all, Xu Heng was too sharp, and half of the people present couldn't understand him.

If Fang Zhonggui pressed it in this way without anyone noticing, it would be of great benefit to any of them.

As far as Xu Heng is concerned, if he doesn't advance aggressively, he won't be a bird in his early years.

Xu Heng should not be the first bird, it is an opportunity for those professors who don't like Xu Heng very much, it's their turn to show their talents!

In this situation, it means that you and I go hand in hand.

But Fang Zhonggui had so many calculations, he never thought of the question he gave Xu Heng, it was too simple!

To be more precise, for Xu Heng, this question is very simple!

He thought he could procrastinate the time with a question from an international physics competition!

He thought that the professors present could easily understand the quantum mechanics questions that Xu Heng had put on the blackboard.

He thought...

He thought too much!

But in fact, when the group of professors and teachers were frowning, Xu Heng looked at Fang Zhonggui and smiled slightly.

This smile!

very creepy...

Fang Zhonggui, "Knock!"

His heart trembled, and he suddenly had a bad premonition!

"Wait! Student Xu Heng! Don't you think about it? Student Xu Heng, are you sure you have the answer in your heart?"

"Student Xu Heng, you..."

"Student Xu Heng!"

No matter what Fang Zhonggui said, Xu Heng nodded seriously.

"Professor Fang, what do you mean?" Xu Heng followed Fang Zhonggui's plan.

Xu Heng could see that Fang Zhonggui cared about him very much, and appreciated and cultivated him very much, so Xu Heng was grateful to him from this point.

Xu Heng appreciates Fang Zhonggui's good intentions.

However, Xu Heng can't act too fake!

In addition, the most important thing is that in Xu Heng's opinion, this question is really too simple.

Xu Heng said bluntly, "The distance that a fish swims in one second is V. We regard this distance as an object, and we must obtain two different images."

"In our calculations we consider only paraxial rays and small angles, and approximate the sine of the angle by the angle itself."

"..."

Xu Heng said concisely, "Professor Fang, you should understand what I'm talking about, right?"

Fang Zhonggui pretended not to be very clear at first, "No, no, no! Student Xu Heng, you should have a detailed chat with me!"

Xu Heng raised his eyebrows, "Professor Fang, you are going too far! You still need me to talk about such a question?"

Fang Zhonggui smiled awkwardly, "Hehe...need it!"

Seeing that Fang Zhonggui sacrificed so much for himself, Xu Heng sighed, "Okay..."

During the speech, Xu Heng glanced at the group of people. They were focusing on the topic of quantum mechanics that Xu Heng had given before. They were frowning, writing and drawing, and they didn't even have a clue.

"Hey……"

Xu Heng sighed, and said in his heart: God won't help you!Thanks to Professor Fang's hard work, you are unworthy!