I have a full-time hero system

Zhou Zhengyi beside Yuan Xiao turned pale: "You actually already have the answer in your heart, don't you?"

Yuan Xiao patted Zhou Zhengyi on the shoulder: "Data will not lie."

The principle of the experiment is not complicated, but the detected results frustrate physicists.

After two hours, the cantilever made a complete rotation.

There is no change in wavelength.

Froz took a long breath: "In this way, I came to the wrong conclusion."

However, he did not hang his head down, instead his eyes lit up: "Then Mr. Yuan Xiao, you must have a new explanation to explain the situation in front of you."

Yuan Xiao also stood up: "Let's announce the results of the experiment first.

Although it is only a current experiment, follow-up needs to continue to monitor. "

Simply today's results, there must be physicists who do not recognize it.

After all, the current revolution position of the planet Bruya may not intersect with the ether.

At least Yuan Xiao himself couldn't prove whether it was because of this reason.

What you want to prove is something that doesn't exist.

"So," Michelson murmured to himself, "that's what Teacher Yuan meant by perjury at the beginning."

All the people were silent.

That evening, the National University published the results of today's experiment.

The world physics community was in an uproar.

"In Newtonian mechanics, the concept of ether is obviously mentioned. I thought it was used to explain Maxwell Froz's equations. The result went smoothly, but now it's nothing."

"The detection of a single location may not be able to explain everything, and the follow-up of the experiment needs to continue to pay attention."

"I don't think it's necessary, the ether doesn't exist."

"Then the question arises, Newtonian mechanics and Maxwell Froz's equations are irreconcilable."

"The two theories are correct in their respective fields, but they cannot be unified. There must be something wrong."

"Is it the result of choosing one or the other, which one is wrong?"

"Teacher Yuan's open class, the National University has not stated that it is over, which means there will be a follow-up."

"This experiment is inaccurate, because considering that the cantilever is also moving relative to the ether, then one of them should be shortened, and it just offsets the influence of relative velocity."

"The above explanation is possible, but it cannot prove that ether exists."

……

There are so many opinions, which also makes the eyes of the entire world's physics community focus on Yuan Xiao.

The history of more than 200 years in the new era has finally ushered in an important dawn.

The National University has specified the time of the second public class, and it will be broadcast live worldwide.

It has to be said that the Principality attaches great importance to this.

Yuan Xiao is also very satisfied. Just this experiment to verify the existence of ether has already made up for the 200 million Aoshi Index that was lost during this period.

The next step is to look at the key.

On this day, the public class was carried out as normal.

When Yuan Xiao stepped onto the podium again, he was greeted with warm applause from the audience.

There are still many doubts, but no one dares to underestimate this high school teacher.

After all, he used his achievements to prove his status in the physics world.

Even a big physicist like Froz is full of praise for Yuan Xiao.

Yuan Xiao held the microphone, and still looked at everyone with a spring breeze: "A few days ago, I explained the contradiction between Newton's mechanics and Maxwell's equations.

The concept of ether can indeed solve the major contradiction between the two theories.

It's just that we have conducted rigorous experiments on whether ether exists.

Judging from the current results, ether does not exist.

Of course, there must be many different opinions here, and I welcome the existence of such different opinions.

Well, if we have been obsessed with concepts like ether, I think it would be meaningless to stand here in my open class today.

Because what I want to talk about is, if there is really no ether, whether the contradiction between the two theories can be resolved in a unified way. "

As soon as these words came out, everyone's eyes lit up.

Can Yuan Xiao solve this problem?

If this is the case, it is undoubtedly a major discovery in the history of world physics.

"To resolve the above-mentioned contradictions, we need to assume two basic principles first," Yuan Xiao continued, "The first principle is that the laws of physics maintain their form in the inertial system.

The second principle is that the propagation speed of the speed of light in vacuum is constant.

Next, I will explain the implications of such assumed principles one by one. "

The first is that the laws of physics maintain their form in an inertial frame.

This is actually a derivative of the original Newtonian mechanics.

Newtonian mechanics also shows that the laws of mechanics remain unchanged in the inertial system.

For example, no matter whether you are flying or riding a train, the only difference is in speed, and there is no one movement that has more advantages in mechanics.

And Yuan Xiao defines all the laws of physics.

That is to say, the laws of electromagnetism and thermodynamics can also remain unchanged in the inertial system.

True God created the world with simple and unified means.

If this is accepted, it also means that there is a unified connection point between Newton's mechanics and Maxwell Froz's equations.

The second principle is simpler.

In the past few days, the experiment of looking for ether has proved that the speed of light is not affected.

But whether the speed of light really remains constant cannot be proved experimentally for the time being.

Therefore, what Yuan Xiao made here was a hypothetical principle.

From the principle of this assumption, a series of laws are deduced.

Once a law has been proven to be correct, it can be reversed to show that the original postulated principle was correct.

This is Yuan Xiao's overall thinking.

"So, on the basis of these two major principles, let's see what kind of changes will happen to the physical world," Yuan Xiao smiled and nodded to everyone, "This is the theory I'm going to explain next.

Einstein's theory of relativity. "

Chapter 400 Yuan Xiao's Theory of Relativity ([-])

Assuming that the speed of light is constant, what will the entire physical world look like.

When this question was raised, apart from the students whispering to each other, the physicists present also frowned.

This assumption violates Newtonian mechanics' view of absolute space and stationary reference system.

Let's see how Yuan Xiao justifies himself.

Yuan Xiao is very satisfied, he has noticed that the system's proud index is constantly increasing.

In order to respect the original discoverer, Yuan Xiao decided to call the theory Einstein's theory of relativity.

"Now we have a hypothesis that we think is correct," Yuan Xiao played the PPT, "that is, the propagation of light does not require a medium, and the speed is constant.

Under this premise, we will soon find that the speed of light seen by the observer is the same no matter what state of motion the observer is in.

In this way, there will be disagreements about the simultaneity of events in the two locations. "

This passage was a bit mind-boggling. Yuan Xiao knew that most people couldn't understand it, so he showed the picture and began to give examples.

For example, a spaceship is flying in a straight line at a very high speed.

People inside the spaceship, do the following experiments.

First, install a photon detector at the same height of the head and tail of the spacecraft.

Once a photon arrives, the detector will immediately light up to remind.

Next, place a photon emitter right between the two detectors.

Then operate the photon emitters to send photons to the head and tail of the spaceship at the same time.

As a result, people inside the spacecraft must see both detectors light up at the same time.

Because the photon takes the same time to reach the head and the tail.

This result can also be established with the explanation of Newtonian mechanics.

Because the state of uniform linear motion is equivalent to the state of rest.

Therefore, although the spaceship is flying at a very high speed, for the people inside the spaceship, it is no different from standing still.

The photons must arrive at the nose and tail of the spacecraft at the same time.

But for the subsequent derivation, the theory of relativity is different.

Newtonian mechanics holds that time and space are absolute, and what changes here is the speed of light.

Therefore, for people outside the spacecraft, what they see is that the detectors at the head and tail of the spacecraft light up at the same time.

For example, this spaceship is flying in a straight line at a high speed and at a constant speed relative to the Bruya planet.

Then on the planet Bruya, someone observing the spaceship is stationary relative to the spaceship.

This is because after the photon emitter emits a photon in the middle position, the bow of the ship is constantly moving away from the photon, while the stern of the ship is constantly approaching the photon.

But the speed of light changes.

The speed of light toward the bow becomes the speed of light plus the speed of the spaceship, and the speed of light toward the stern becomes the speed of light minus the speed of the spaceship.

This change in the speed of light cancels out the speed of the spaceship.

Because according to the analysis of Newtonian mechanics, what people outside the spaceship see is that the head and tail detectors light up at the same time.

In this way, no matter the people inside the spaceship or the people outside the spaceship, they have the same understanding in terms of time and space for the event that the detector lights up.

but!

Yuan Xiao raised his hand: "Now we assume that the speed of light remains constant, so what will happen?"

Froz seemed to understand something in an instant, and his face immediately turned pale.

The rest of the physicists also stared wide-eyed.

The students frowned.

Yuan Xiao first gave a conclusion: "It's very simple, according to the principle that the speed of light is constant, the speed of light is constant for people who are far away from the spaceship.

Then the distance for the photon to reach the head of the spacecraft becomes larger, and the distance for the photon to reach the tail becomes smaller.

So they will see that the detectors at the stern light up first and the detectors at the bow light up last.

I think everyone can understand this result after thinking about it for a while. "

With such an explanation, even the students nodded.

Imagine, it's a very simple thing to do.

Yuan Xiao's PPT presentation diagram clearly explained it.

However, this creates a problem.

The people inside the spaceship thought that the detectors at the head and tail were lit up at the same time.

People outside the spacecraft think that the tail lights up first, and the head detector lights up last.

Yuan Xiao looked back at the screen: "This is because the speed of light is constant, and the resulting simultaneity is relative.

In this way, the time when the detector lights up measured by people outside the spacecraft is different from that of people inside the spacecraft.