Chapter 413：

The original professional teacher has been on leave due to illness, and everyone thought that this semester's classes could only be made up for next semester.

But no one expected that the school would actually recruit such a powerful professor.

This surprised everyone.

But now, Su Yu looked at the dozens of students and nodded with a smile.

"Who is the study committee?"

"Professor, me."

A cute-looking girl raised her hand and looked at Su Yu excitedly.

In response, Su Yu nodded again and asked.

"Where did you go to the class before?"

"Professor, we went to the double-slit interference delay experiment before, but we haven't talked about it yet." The girl replied quickly after thinking about it.

In response, Su Yu nodded and motioned for the girl to sit down.

"Since I haven't talked about the double-slit interference delay experiment, I just have time tonight, and I can give you a preliminary introduction to the general process and theory of this experiment."

Chapter 0369 The supernatural, bizarre results of science

Let me tell you about the initial process.

As soon as Su Yu said these words, the entire classroom immediately fell silent.

In this regard, Su Yu smiled lightly.

"This experiment involves a lot of things, and the background is quite complicated. Here I will try my best to help you understand this experiment in an easy-to-understand way."

With that said, Su Yu wrote a line on the blackboard.

[This is the first supernatural event in the history of science]

Su Yu wrote this sentence, which made many students suddenly look shocked.

without him...

It is unbelievable that the two words science and supernatural are linked.

This is simply incompatible!

In this regard, Su Yu did not rush to explain anything first, but looked at everyone.

"As written on my blackboard, the double-slit delay interference experiment is the first supernatural event in the history of science."

"The next thing I'm going to talk about, I hope you will look at it from a rational, objective and inclusive perspective, although its results may not allow you to be objective."

Su Yu smiled lightly and quickly got to the point.

"Just as people a thousand years ago couldn't understand technology today, so people 100 years ago couldn't understand quantum physics."

"First of all, let me ask you a question, is light a wave or a particle?"

Su Yu smiled and looked at the hundreds of people in the entire classroom.

Hearing this, someone immediately raised their hand.

"Professor Lin, light is wave-particle duality!"

"Very good, quick response."

Su Yu smiled and nodded.

"Yes, light has wave-particle duality, which is what we have drawn from previous conclusions, but do you know that there has been a grand war in the scientific community on whether light is a wave or a particle? "

"Now, let's go back in time to the early 20th century."

Su Yu wrote a year on the blackboard.

"In 1924, de Brooke proposed wave-particle duality, and before that, the entire physics community had a protracted war over whether light was a wave or a particle."

"Among the scientists involved in the war, there were many scientific giants including Newton and Hooke, but in the end, they were all wrong."

"Light is neither just a wave nor just a particle, but has wave-particle duality. The reason why we can draw this conclusion is because of the focus of our lesson, the double-slit interference experiment."

"That's the point of the war over whether light is a wave or a particle."

"It is no longer important whether the result of the double-slit interference experiment is a wave or a particle. What is more important is that it leads to a new theory. Here we will talk about it later, first of all, let's talk about the experiment itself."

"In order to prove whether light is a wave or a particle, Bo and Grain decided to do an experiment. The experiment itself is very simple, that is, let light pass through a partition with two slits."

"Lipi believes that light is made up of photons. When you turn on the flashlight, the light continuously rushes out of the flashlight to form a beam of light."

"And Pope believes that light is a kind of wave, which takes itself as the origin and radiates and spreads around, similar to the ripples on the water surface."

"It is worth noting that both the Grain School and the Pop School had sufficient theoretical support at that time, which is also the reason for the disputes between the two sides."

"And now back to the experiment itself, the experiment is to let light pass through the slit and eventually fall on the photosensitive plate behind the slit."

"If light is a particle, then after it passes through the gap, it will clearly leave two bars behind."

"And if light is a wave, it leaves a zebra-like continuous fringe behind because of the interference effect."

"That's the idea of ​​the experiment in the first place and the possible outcome."

"OK, the first experiment started, and the results were very clear. The light showed a zebra pattern in the back. Pope won!"

"This result made Poppy excited, but later Grape was dissatisfied, because in Grape's theory, light is just particles, and they should be launched one by one. You are obviously cheating!"

"So at the request of Lipi, the second experiment began, and this time the photons were emitted one by one."

"And the result is exactly the same as before, showing zebra patterns, and Pope wins again!"

"This conclusion makes the whole grain pie feel incredible, because according to the wave theory, the appearance of zebra patterns is due to the mutual interference of light, but after a single photon is emitted, it can only pass through a single gap. How can zebra patterns be formed?"

"Is it possible that the photons are divided into two parts in the process of passing through the gap? This is impossible!"

"So in this case, the third experiment appeared, and this time it was the weirdest one."

Su Yu said and wrote a few words on the blackboard.

【Observer Principle】

"Now go back to the third experiment. In the third experiment, Lipi installed a sensing device on the photosensitive plate. It can sense which gap the photon appeared from, and the experiment began."

"This experiment, at the beginning, let all the pie pie breathe a sigh of relief. Yes, the photons did not split, but the same major problem appeared."

"The same experiment is just the addition of the sensing device. This time, the structure has changed from zebra pattern to two bars, and the two bars represent light particles!"

"This conclusion made all the Poppies in an uproar, how is this possible, and likewise, the Grain Pies are equally unbelievable. Why did the light suddenly change from waves to particles under the same experiment, just with the added sensing equipment?"

"What's the situation? You may not understand the meaning behind it. Just particles and waves are supported by a group of scientists, and these are all based on sufficient theories."

"And now, these theories are about to collapse. Why does light change from a wave to a particle in the observed state?"

"What does this mean, when you don't look at it, it's a wave, and when you look at it, it becomes a particle again."

"It's just like I'm lecturing with my classmates now. Objectively, it can be considered that I'm bound to lecture today. Even if I don't lecture, it's due to some personal reasons, but if we look at the results of the double-slit delay interference experiment. , whether I will come or not depends on whether you are observing. That is, whether you are sitting here or not."

"Going further, in our world, if individuals are not in a state of observation, does the world exist?

Will your loved ones, your friends, be particles when you observe them, but become waves when you leave? "

Su Yu smiled.

When he said this, everyone present was in an uproar.

What theory is this?

When observing, is one state, and when not observing, it is another state?

In the live broadcast room, countless viewers were also in an uproar.

[No, you wait for me to sort out my thoughts, I don't quite understand it]

[I seem to understand, Su Shen’s analogy is that this world, when we see it, is in one state, and when we don’t see it, it is another state? 】

[This is the truth. This is the most bizarre part of the double-slit delay interference experiment. Since light can show two different states when it can be observed and not observed, is our world the same? 】

[The state when you go out and see someone is completely different from the state after that person disappears from your sight! 】

【My grass! Inexplicably, my scalp is a little numb, thinking of the game, sometimes the action speed is too fast, and the screen and NPCs are too late to load...]

【Absolutely! Absolutely! 】

[Earth OL is hammered! 】

In the live broadcast room, countless audiences were also discussing.

At the scene, Su Yu still had a faint smile on his face.

"The current state of the students is the state of the scientists at that time. They were shocked and unbelievable, so they followed up with the fourth experiment."

"The method of the fourth experiment is improved compared to the third experiment. Specifically, after the photons are emitted and pass through the gap, when they are about to fall on the photosensitive plate, the sensing device is quickly installed."

"As a result, as with the third time before, no matter how fast the induction equipment is installed, as long as it is in the observation state, the light is always in the particle nature, and as long as the observation state is released, the light will show the wave nature again."

"The same, not only that, even if later scientists use quantum entanglement technology to emit photons, the results are still exactly the same."

"That is, photons show particle properties when they are observed, and when they are released from observation, they show wave properties."

When Su Yu said this, everyone was even more surprised.

One of the female classmates raised her hand weakly.

"Teacher, since what you said is so terrifying, how is this experiment finally explained?"

"How to explain?" Su Yu smiled, "Good question."

Saying that, he wrote a name on the blackboard.

【Pol】

"This strange changing state of light caused countless scientists to be puzzled, and even panic, until the birth of Bohr."

"He proposed the principle of superposition of states, the principle of inability to measure, and the principle of observers."

"This superposition of states means that in the quantum world everything has various possibilities, it may be on the left, it may be on the right, it may be both left and right, these are all we can't imagine, after all There is no black and white in the real world."

"The second one cannot be measured, which means that the superposition state can never be accurately measured. We can know its position, but it is impossible to know its speed. It is worth noting that the impossibility here is not the impossibility of current technological means. Possible, but impossible from the laws of the universe, just like the speed of light can never be reached."

"And the third, the observer principle, although things in a superposition state are in various possibilities, we have it that it is impossible to see things that are both black and white, so as long as we observe, we will get a definite As a result, things that are in a superposition state are collapsed into a deterministic state the moment they are observed."

"As for how it collapsed, there is still no explanation for this."

"And these are the explanations given by Bohr. Of course, most scientists don't agree, but they also can't refute this explanation, because they don't know what the principle is."

"Only for this, a cat appeared, Schrödinger's cat."

Saying that, Su Yu was about to write a few words on the blackboard.

The bell rang.

Chapter 0370 When the get out of class is over, the cigar is really exciting

The bell rang.

Ok?

Seems like it's time?

Su Yu looked at everyone.

Everyone obviously didn't respond that time passed so quickly.

"The get out of class has been dismissed, and since that's the case, I'll talk to you next time when I have time."

Su Yu spread out his hands, his expression a little helpless.

This made many students look a little regretful.

I haven't heard it yet.

"Professor Lin, can we continue to listen next time?"

"Yeah, I'd love to know what happened next."