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Chapter 397 This is How I Verify the Existence of Ether

As soon as this sentence came out, even though there were leaders from the Science and Technology Department of the Ministry of Education and the teachers of the school present, the students couldn't help being in an uproar.

They also understand some of the recent online debates. Even Froz himself admitted that "whether there is ether" is just a conceptual idea and cannot be proved.

Now, in front of so many people, a high school teacher says he can prove it.

This is absolutely astounding.

Proud index +54120, +14328, +7481, +25633...

However, Yuan Xiao's mind is not on the increase of the Aoshi Index now, he has fully entered the state.

"Indeed, the introduction of the concept of ether can perfectly solve the problem of incompatibility between the two theories, and even light waves can be solved," Yuan Xiao reminded, "However, if you want to enter the palace of science, you need verification."

No one objected to this point of view, even Froz nodded in agreement.

"Then continue our topic," Yuan Xiao manipulated the PPT, and a new page appeared, "Actually, it is not impossible to verify the existence of ether.

Assuming that the ether really exists and is stationary, and light travels through the ether, if our experimental equipment has a relative speed to the ether, then we should be able to measure different speeds of light. "

The reason is very simple, like two moving cars, if they are in the same direction, the relative speed is the difference between the two, if they are in the opposite direction, the relative speed is the sum of the two.

This is the conclusion given by Newton's three laws.

With that said, the students understood one after another.

Suppose now there is a light source, which travels with ether as the medium, and the speed is C.

In addition, there is a reference frame that moves relative to the ether, and the speed is V.

If both are in the same direction, then the speed of light is CV.

If the two are in opposite directions, then the speed of light should be C+V.

No one in the room objected to the inferences made here.

Isn't this a very simple application.

Froz also nodded.

The rest of the physicists took out their papers and wrote something.

"The problem is that we now know that the speed of light is 30 kilometers per second," Yuan Xiao pulled his hands apart, "If you measure the speed of light directly, let alone the error, I am afraid that if you want to get an accurate value, it may require a huge equipment to make it happen.”

This is where the trouble starts.

C is equal to 30 kilometers, and the V of relative motion needs at least a certain value before it can be measured.

Otherwise, even if there is a difference between the value of C+V and the value of CV, it is impossible to identify whether it is an experimental error.

This is where physicists such as Froz find it difficult.

The principle is simple, but it is difficult to implement.

"However," Yuan Xiao smiled, "We can use other relative speeds to improve part of the accuracy.

Here I have a clever experimental method, everyone looks at the screen. "

The PPT switches, and a schematic diagram comes out.

"Assuming that the ether exists, then everyone knows that our planet Bruya is revolving," Yuan Xiao reminded, "and the speed of this revolving is about 30 kilometers per second."

The students were still silent, and Froz was the first to stand up.

"Why didn't I think of it!" His tone was a little excited.

The other physicists were also stunned for a moment, then nodded frequently.

This is indeed the most immediate relative velocity available.

"Professor Froz's excitement, I understand very well," Yuan Xiao continued, "but give me a little time to explain the whole experiment clearly."

Froz looked cautious, and he sat down and took out his notebook to write something.

If it was said that he still had arrogance and prejudice towards Yuan Xiao, it would have disappeared completely by now.

"Then, when our planet is revolving, it must be moving against the ether, which will cause a difference of plus or minus 30 kilometers per second to the speed of light," Yuan Xiao pointed to the screen, "Compared to the speed of light, this speed is not enough. Calculate fast.

However, whenever there is a difference, we can detect it.

Here, the interference between the speed of light should be used. "

Yuan Xiao paused here for a moment, allowing the physicists to digest the relevant information.

It is very difficult to measure directly, but using the known relative speed difference and the interference of light waves, if there is a real speed difference, the interference fringe movement after interference can be calculated.

In this way, it can be confirmed whether the ether affects the speed of light.

"As you can see in this schematic diagram of the equipment," Yuan Xiao pointed to the picture, "This is a cantilever that is perpendicular to each other.

In the center of the cantilever, there is a light source, a half mirror, and an interferometer.

In this way, the light source produces light and shoots to the beam splitter, and the beam splitter divides the light into two mutually perpendicular rays.

Then use a total reflection mirror to reflect it back.

Finally, it enters the interferometer to generate an interference pattern.

That's how the device basically works. "

The students don't understand it yet, but the physicists understand it vaguely.

One by one couldn't help whispering.

Froz also nodded frequently.

This is indeed a very clever method.

After the light from the light source is divided into two perpendicular to each other, the distance they reflect back is the same.

If the speed of light does not change, the two beams of light reach the interferometer at the same time, and the interferometer can detect the wavelength of the two beams of light after interference.

If the speed of light of the two beams of light changes, and the time it takes to reach the interferometer is different, the interference fringes will shift.

In this way, the wavelength change of light after interference becomes clear.

Yuan Xiao glanced at the audience: "My personal calculation results, if the speed of light is inconsistent, then there will be a wavelength change of 0.04 times before and after."

Such a calculation is not difficult, the data is already available, Yuan Xiao just finished speaking, and other physicists also got a consistent answer.

Froz sighed: "That's true."

On the contrary, if the speed of light is constant, no matter when and where it is measured, the wavelength after interference will not change.

Yuan Xiao put the laser pointer on the podium, and he supported the podium with both hands: "Yes, through this method, we can know whether the speed of light has a speed relative to the ether.

That is to say, whether the ether exists can be checked out.

This is how I verify the existence of ether. "

As soon as this sentence was said, the get out of class bell rang.

As usual, Yuan Xiao would not delay class, he packed his things and prepared to leave.

This time not only the students, but even the physics professors quit.

What is this? It's broken again here.

We are all itchy.

A large group of people surrounded it, and it was completely blocked.

Froz was also sweating profusely: "Mr. Yuan, have you already done the experiment you proposed?"

"That's right, Teacher Yuan, let me tell you about the result."

"Don't worry about get out of class, we can continue to listen to you."

Yuan Xiao smiled: "That's not good, it's not good to affect the normal curriculum of the school.

Well, I heard that the open class is not limited to this one session, let's talk about it tomorrow. "

Tomorrow, tomorrow peat.

I don't want to wait for 1 minutes!
　Thank you @远方的泉水 for your tip.The last few chapters involve the topic of physics, I just briefly describe it, just take a look.

　　However, due to space limitations, those that conform to the real research results are too in-depth to expand, so let’s take a look.

　　Thank you all for your support!

　　
　
(End of this chapter)