Can time really go back?

Here are some answers I am looking for, a little more scientific. Let's see:

It can't exceed the speed of light, so "time can't tunnel"

First, according to the theory of relativity and the existing experimental facts, the speed of any object with non-zero rest mass cannot reach or exceed.

The disc with larger radius mentioned by Mr. Dawn, the new moon of light speed, no matter how its radius and speed change, its edge

The speed will not reach or exceed the speed of light. But if it is not a disk, it is the excitation of a high-speed rotating laser generator.

Beam, then, as long as the laser generator rotates at a sufficient speed, the far end of this laser beam will make a circular scanning motion in space.

If it is high enough, the scanning speed at the far end of the laser beam can completely reach or exceed the speed of light. But this is the scanning speed, not the usual.

The speed of matter. In fact, the speed of photons in this laser beam is only the speed of light. (The rest mass of a photon is

Zero, so photons can move at the speed of light).

Second, because the speed of any object cannot exceed the speed of light, the "time tunnel" in science fiction cannot exist.

Yes

It is impossible for human beings to see the activities of their ancestors, but human beings can let future generations see our activities.

The "self" people see in the flat mirror is not the instant "self", but the "self" some time ago.

If the distance between the plane mirror and people is 1.5 meters, people will see the "I" one billionth of a second ago from the plane mirror.

1.5 meters I divide by 2, and the speed of light is equal to one billionth of a second. I saw it when the distance between the plane mirror and people increased to 15 meters.

It would have been me a millionth of a second ago. When the distance increases to150m, I will see it a millionth of a second ago.

"I", as you can imagine, if humans put a flat mirror on the planet 1 light-years away from the earth, then humans will pass.

This flat mirror saw the scene two years ago.

If humans put a flat mirror on the planet 1000 light-years away from the earth, it can be seen by future generations after 2000.

Prehuman activities. Of course, this is a scientific fantasy, but this fantasy is different from "time is the way", and the former is reasonable.

Theoretically, it is possible, but technically, it is not possible. While that lat is theoretically impossible to realize.

Yes "Going with the times" is just a fantasy, but it is not a scientific fantasy.

Third, "blow" the superluminal world again. Suppose there is a superluminal world, then in this world,

The speed of all objects will exceed the speed of light, and only the speed of photons is the speed of light. In the superluminal world, the speed of any object.

Degrees cannot be lower than the speed of light. This ftl world can't communicate with us, because things in ftl world.

We can't come to our world, nor can we go to the superluminal world, which is one of these two worlds.

An insurmountable gap between them. Even if photons arrive in our world from the superluminal world, because

There is no difference between photons and photons emitted by the superluminal world. When we observe this photon, we will assume that this photon is

Photons in your own world.

Since we can't observe the superluminal world in the world, we can only assume that the superluminal world does not exist.

Excerpt from "Hot Topics" in No.363 of Lu's Book of Changes.

Although human beings can't exceed the speed of light, they can walk in front of light.

I really found it interesting to read the post of the New Moon Dawn Man. I was also interested in this aspect in middle school.

This guy and I have different views on "ftl" and "just visiting" I always vaguely feel that human beings are

"Faster than light" is impossible (theoretically possible, but practically impossible), but "just visiting" is over.

Anything is possible. For example, now we have a very big circle, and we walk from one end to the other along the diameter of the circle.

And let the light go along the circle from one end to the other (as we all know, light can be distorted), and then you will

Through this beam of light coming from all around, I can see the scene where you leave.

So my opinion is that although human beings can't exceed the speed of light, they can walk in front of light.

Excerpted from Sawyer's Hot Topics, No.363.

Sender: JollyBird

Learn more about Einstein

These are all good ideas!

I don't know much, and it's not surprising that I can't answer correctly.

First, the big disk is so big that I don't know what to do to ensure the angular velocity of each point on the disk is consistent.

At the speed of light, the disc has spread out. But "superluminal" has actually been observed (Hubble redshift principle), "Ain

Stan has explained this.

Second, Einstein said that the maximum speed of matter in the universe is the speed of light. Things interact and transmit information.

It must happen directly, such as gravity through a gravitational field. Field is also a thing, and so is the maximum speed of its establishment.

This is the speed of light. Plus other things that don't reach the speed of light, when your "1, 2,3" reaches the other end, the light has already arrived.

Let me give you more details: The first promotion series A Brief History of Time came from Cambridge, England.

Professor Hawking wrote it. After reading it, I believe you will know Einstein better.

Excerpted from Sawyer's Hot Topics, No.363.

Sender: mortal

Discussion is just a visit, and we must first solve the essence of time.

The discussion is just a visit. I think we should first solve a problem: what is the essence of time? Is "the past" possible?

Reproduction? Some people say that time is like a series of photos hanging on a rope, which means "past"

With the passage of time, everything, or every moment, is preserved in some way, then we can

Go back to the past by some technical means (such as just visiting).

I prefer this explanation, so that we can consider the problem of "new moon dawn" friends: since time

Just like photographers, we can only change what didn't happen, what happened in the past, and now we have "photographed"

Come down, how to change it?

But in the final analysis, I think this is a key question about the nature of time. I don't know much about physics. I don't know me.

To what extent have we studied this problem at present? Can a friend give me an answer?

Excerpted from Sawyer's Hot Topics, No.363.

From: Benny.

From a mechanical point of view

As for the theory of relativity, I came into contact with it while studying quantum mechanics. Specifically, it is still unclear, but it can be pointed out that,

No matter special relativity or general relativity, it is clearly pointed out that the speed of light is the limit of the motion speed of an object.

The speed of an object can only be infinitely close and cannot exceed the speed of light. According to the relative motion principle of classical mechanics, two beams of light

Relative motion, in which the speed of one beam of light relative to the other beam will be 2c, but this is not the case, their relative speed.

Still C.

The coordinate system in relativistic mechanics is no longer Ducal coordinate system, but four-dimensional coordinate system, not just xyz three.

Space coordinates and time coordinates t. The mass of an object (in a stationary coordinate system) and its speed of motion.

There is the following relationship m = m0 (1-v * v/c * c)-1/2. The negative half is the reciprocal of the root of (1-v*v/c*c), M0.

It is the mass of an object in a static test, just like how many kilograms we weigh.

Because the formula is difficult to write and speak, I only analyze it from the simplest place: it can be seen that the greater the speed of movement, the better the quality.

The bigger it is, if the speed of an object relative to us is 0.99c, then its mass is 100 times of the rest mass in our opinion.

. What if it's faster? If its speed is equal to the speed of light, its mass is infinite according to e = 0.

.5 * mc2 can know that its energy is infinite, which obviously violates the general principle of energy conservation.

Yes, because nothing can provide it with energy indefinitely.

Some people will ask: What about light? Isn't it the speed of light? Yes, but the rest mass of light is 0,0 *∞ =1(this only

Refers to the limited amount). So only light can reach the speed of light, nothing else can. So the so-called establishment is based on superluminal.

It is unrealistic to speed up the time tunnel.

The above is just my personal opinion based on the special theory of relativity. If there is any inaccuracy, please forgive me and welcome everyone.

Discuss this matter.

Excerpted from Sawyer's Hot Topics, No.363.

From: William Leo.

Einstein's equation is absolutely correct.

I think it's almost boring for us amateurs to discuss this kind of problem here, but it was my great hobby ten years ago after all.

Come and play together.

First of all, I want to tell you that Einstein's equation is absolutely correct, which has been proved in many scientific fields.

Ming. For example, there is a particle whose life is very short, but its life is fixed.

When this particle moves at a speed close to the speed of light, its life can be multiplied. This proves that the object is traveling at a speed close to the speed of light.

Time will slow down when moving. But what Xuanbg said is also reasonable, just as Newtonian mechanics has its scope of application and relativity comes first.

There must be a scope of application, but we haven't found it yet.

I think if there is a four-dimensional space, Einstein's theory may not be applicable. In that space, when

Maybe we can stop. According to Lorentz transformation, if the speed of light is exceeded, an imaginary number will appear, but no one will bear it.

Understand virtual matter, time and space. In fact, let's change our thinking: doesn't imaginary number represent the fourth dimension? we

Middle school knowledge tells us that once a real number becomes an imaginary number, an imaginary axis must be added to the real axis, and

Is from one-dimensional space to two-dimensional space. Similarly, if you exceed the speed of light, you can enter the four-dimensional space from the three-dimensional space, and

It is not what netizens said, "a world that can only exceed the speed of light." Of course, this is only logical reasoning, because

According to the theory of relativity, we can't reach the speed of light, in other words, we can't break through three-dimensional space.

I don't agree with the comments of users of China Eastern Communications. I don't believe that qi function can achieve that effect. I think

Qigong is a psychological suggestion to a great extent, similar to hypnosis, so some people will laugh and cry at the meeting. Someone did it.

Experiment:

After hypnotizing someone, let him put his head and feet on two tables and fly in the middle; Drop a drop of cold water on his hand.

And shouted "boiled water", and the hypnotized person had blisters on his hands at that time. In a primary school, students also suffer collectively.

I suggested that I was allergic to the immune drugs, but I had a collective stomachache. In fact, the drugs had not expired, and the doctor found the reason and explained it to the students.

Symptoms disappeared after discharge. This is also the reason why Qigong believes in God. The users of Dongfang Communication really have no foundation, so they can't.

Believe in it.

Excerpt from Sawyer's Hot Topics No.367.

Sender: Luo Cheng

Particles that are far apart can really interact.

It is a scientific attitude to doubt the existence of unobservable things, and it is a religious belief to believe the existence of unobservable things!

If we say, "We can't say it doesn't exist just because we haven't detected it yet", then we are talking about literature.

Is it physics? Imagination or logical reasoning?

As for the "marginal velocity of a disk", we all know that when an object approaches the speed of light, its mass will increase infinitely, and a mass will increase infinitely.

Can the market continue to accelerate?

A pair of particles that are far apart can indeed interact, but it is only "interaction", although it is still difficult.

To explain, but scientists have not observed any movement between them. The speed of light is still an unbreakable limit.

Excerpt from Sawyer's Hot Topics No.367.

Sender: Carcy

"Time follows the path" deviates from the basic logic.

There was a major mistake in yesterday's article due to careless typing. Apologize to your friends! Yesterday's article "But I don't

I object to people discussing' superluminal', and I don't think discussing' superluminal' is idealism or anything else. "

It should be changed to "I don't think discussing' superluminal' is idealism or anything else."

In many articles, two professional physicists have mentioned that there are experiments that can prove the existence of "superluminal". I

I don't know much about elementary particles and theoretical physics, and I can't understand the professional papers related to "superluminal". but I ...

There are often many explanations for a new physical experiment fact, and "superluminal" is probably just one of them.

Explain, before finding more, more powerful and more direct experimental facts, or before finding an effective description.

In the face of the mathematical tool of "superluminal" theory, I think we should still believe that the theory of relativity is correct.

Some fantasy novel and fantasy film and television works describe people returning to history through "just visiting", which leads to

A tortuous and bizarre experience. These works can be used as entertainment, but don't think that "time drive" may be realized in the future.

. We imagine someone going back to yesterday through the "time tunnel", and "someone today" who went back to yesterday met "yesterday"

Someone ",two people quarreled, and in a rage" someone today "killed" someone yesterday ". Because "yesterday"

Someone was killed in the sky, so "someone today" can't exist. In other words, "the passage of time"

Deviated from the basic logic, so we are talking about the fantasy of "time passing", not scientific fantasy.

Similarly, causality in logic can be used to explain that it is impossible to observe history with a "superluminal" rocket.

In the so-called "superluminal" rocket, we will see the harvest before sowing in the farmland and in the automobile factory.

I saw the car re-enter the factory gate, but the raw materials were sent from the factory. On the way, a child called his mother, and so did his mother.

Not born. In a word, all phenomena seen in the so-called "superluminal" rocket have results first, and then reasons.

Logical causality will be reversed. We believe that logic can't be destroyed, so we talk about "superluminal" rockets.

Will not exist.

Excerpt from "Hot Topics" in No.367 of Lu's Book of Changes.

Visiting and Supersonic Velocity from the Perspective of Relativity

There are still a few words to say about this topic.

Marsboy's friend said, "Because I didn't see it with my own eyes, I don't say it must exist, and I don't say it must not exist."

Logically, it is true (in fact, I made an idealistic mistake in philosophy, so I will stop here for the time being.

Do not discuss the right and wrong of materialism and idealism). We can think that the current scientific system has been established.

Foundations do not conform to this logic at all.

Let me give you a simple example: as all friends who have studied geometry know, geometry has axioms, theorems and inferences, the latter one.

Generally derived from the former; And where does justice come from? "Parallel lines never intersect", we can only enumerate.

Give a limited case to prove it. Who can guarantee that the points we can't draw won't intersect?

? In fact, the axiom of geometry is a recognized conclusion that everyone has summed up in their daily life. This accepted standard is

What law of gravity says that all objects interact with each other, and we only know that the sun is on the ground.

The ball and the earth are attractive to the moon, but how to prove that there are effects between the two stars that we can't explore?

? ……

There are countless examples of this. In fact, I sometimes feel very confused myself. Study electrodynamics, relativity,

This often happens in quantum mechanics. For example, quantum mechanics consists of five basic assumptions. As the name implies, suppose

Not confirmed. If the wave function of the motion state of an object satisfies Schrodinger equation, if you have seen quantum.

Mechanics books will know that the derivation of this equation is a hypothesis from beginning to end. Who can see atoms? Nucleus? worship

g？ I'm afraid no one has any objection, but everyone admits it.

Having said that, I just want to let everyone know that logic is sometimes unreliable. Actually, kou_t's shadow friend said

For example, there are many phenomena that seem to refute the truth of relativity. For example, a accelerates relative to b, which can be seen from B.

A's time will slow down, which is the so-called "delay" effect. So a pair of twins a &；; B, A Travel in cross star.

It should be smaller than B when it comes back, but from the perspective of relative movement, B has also accelerated its movement relative to A, and B should be smaller than A..

So who is younger? ..... This is a famous "twin paradox", if we simply divide it by relativity.

After analysis, the conclusion is that everyone is about the same age, because the relativistic effects when A is far away from B and later close to B cancel each other out.

If we use the coordinate transformation formula of four-dimensional space to solve it, we will get a clear conclusion. There is such a paradox in relativity.

There are many books that interested friends can read.

Xuanbg's friends think that this formula of quality is not necessarily correct. In fact, his understanding of four-dimensional space is not good. this

This formula is derived from the four-bit space coordinate transformation formula. As for this formula, I will discuss it with you again.

Some friends think that qigong can exceed the speed of light ... oh, how can I say it? I don't know if you have heard the story of Zhang Baosheng.

? At first it was blown to perfection, and finally it was exposed as pseudoscience.

Finally, our current scientific system is like this, and the process of development is a special phenomenon-(research reasoning.

Summary)-> conclusion-(extended deduction)-> universal phenomenon-(supplementary modification)-> universal law->; Jeppu

Problem,-> Is that the commonality of philosophy->; Special-> so-so. If there is no scientific basis, you can say so-and-so quietly.

The law may not be established, and even hope to draw another set of things. This is an unrealistic idea, not even science fiction, but just

Utopia, as if the level of productivity is not high enough and there is no strong armed force, is doomed to failure.

Excerpt from Sawyer's Hot Topics No.367.

From: William Leo.

The speed of light is only the speed limit of the known universe.

After reading your speeches, I have something to say. A basic concept is confused here. Only we know the speed of light.

The speed limit of the universe. According to the theory of relativity and its derivatives, there should be a superluminal universe. Superluminal universe

The lowest speed should be the speed of light only because we know that the universe needs infinite energy to break through the speed of light and reach superluminal speed.

The universe. Moreover, relativity is not the ultimate theory in physics, which has been proved in derivative correlation experiments.

It is theoretically possible to transmit information at superluminal speed in the universe. As for the time tunnel, there is no basis in theory.

However, most leptons (electrons, etc. ) can cross the energy barrier, a bit like a time tunnel. To modern physics

Interested students can contact me: mailto: flyshop @188.net.

Excerpted from Sawyer's Hot Topics, No.267.

Sender: Ye Fei

Why can't it exceed the speed of light?

Relativity proves that to accelerate a mass entity to the speed of light (it can only reach the speed of light, let alone exceed it).

), you need unlimited energy, regardless of its quality. When you push that huge disk, I'm afraid it's very

You will soon find the problem of lack of energy. Although your goal is only to make part of the disk exceed the speed of light, but

I don't think nature will be flexible because of this.

There is another factor: the faster the speed, the shorter the length of the object. I believe everyone understands this concept. turn

The outer ring of the disc will be shortened, and when the edge of the disc reaches the speed of light, its diameter will be reduced to zero! This is another impossibility.

From this, I want to draw a conclusion: if you have enough energy (not infinite) and assume that the turntable is strong enough.

Without being torn by centrifugal force, you will get a black hole, and this turntable will shrink into a black hole when it is very close to the speed of light.

. I dare not say anything about relativity, especially in this case, because of its centrifugal acceleration, the turntable makes

General relativity and gravitational field have become factors that cannot be ignored, so I don't know whether my conclusion is valid in the eyes of experts.

That's ridiculous.

Faster than light means going back in time, which is true, and physicists say so. Some self-righteous popular science articles

The author said: Faster than light, you can catch up with the light emitted in the past, and seeing the passing scene becomes "back in time". Wozhong

I did read this kind of article at school. These writers must have been hurt by the early separation of arts and sciences. This may be a bit harsh, but

That misleading article is a shame.

If that's the essence of going back in time, then the first projectionist who plays movies backwards is the hair of a time machine.

Ming people.

It is strange that "New Moon Dawn" not only knows the Doppler phenomenon, but also makes such mistakes. Do you think that at supersonic speed

Can you still hear "one, two, three" as "three, two, one" Let's write in pinyin, which may be better explained:

I said "one, two, three" and you heard "Nasrae". Can you try to pronounce these words in Chinese?

This is even more impossible for light. Don't forget that the scene you see with your eyes is composed of many photons, even if you run away.

Capture them in space. I'm afraid what you saw is enough to make you wonder when the photon ran backwards.

Whether the so-called concepts of "vision" and "seeing" are still valid.

The understanding of superluminal and time reversal is only a small loophole, and the key is superluminal.

The true essence of speed is misunderstood. Let me explain from the well-known conclusion that with the increase of speed,

The fact that time will slow down, in fact, for objects traveling at the speed of light, time is static, and superluminal speed leads to time to go back.

This is the natural inference of this phenomenon.

If it exceeds the speed of light, time will be reversed, which is the result of substituting data greater than the speed of light into the relativistic formula.

To put it bluntly, this is more like a math game, which does not mean that physicists recognize the feasibility of superluminal.

In this way, if you can run at the speed of light, when you reach the speed of light, you will enter a static eternity.

On earth, it seems that travelers who have spent tens of billions of years rushing from one end of the universe to the other have their own feelings.

Infinitely short moment, in which he has seen all the future until the end of the world.

As for the ftl traveler, he arrived first and then set off. Time is really reversed, not just seen.

Let's go He can go into the past, talk to people in the past, exchange gifts or fight with each other. As for whether history can change, phase

At present, this is a philosophical problem, not a physical or mathematical problem: perhaps changes have taken place, but we are still alive.

In this changed history, how do you know that it has changed?

Finally, it should be emphasized that relativity speculates that superluminal speed will lead to time reversal, but superluminal speed is no longer within its scope of discussion.

Inside the shell. As we agree, 0 is inseparable, but there are non-Euclidean geometries that make it possible. Is a negative number a square root?

Meaningful, but created the imaginary number theory; As long as the theory of relativity is not overthrown, we can never prove whether it is possible to surpass it.

it ...

It's just that I personally think there is a limit to human cognitive ability.

Excerpt from Sawyer's Hot Topics No.367.

Sender: Fat Cat

Before there is any new evidence, we should base ourselves on the (special) theory of relativity.

Can the speed of light break through and does the superluminal world exist? You shouldn't use it to answer such questions. I believe, I don't believe.

This method is discussed. Everyone has the right to say yes or no, no matter whether he is proficient in modern physics or ignorant. However, objectively speaking,

The world will not change because people believe it or not. We live in the real world, and everything can only start from the world itself.

To explain the world. According to our intuitive experience, it is hard for me to believe that speed is infinite, just as it is hard to believe that speed is infinite.

Like the universe.

However, when there is an imaginary equation in quantum theory, isn't it difficult for us to accept it? But after many experiments,

Confirmed, especially before it is denied by new experiments, we have to accept the existing theory. Mankel Johnson

The importance of the experiment is not that it affirms or denies itself, but that it gives a clear answer. Human cognition

The ability of the world is limited, and we don't know how many secrets the world is. At this point, we can realize that

Because maybe the speed of light can be broken.

But as mentioned above, it may not be equal to the fact. So far, the latest science of mankind is basically certain.

Relativity. So I think the attitude we should adopt is that we should base ourselves on (narrow sense) before there is new evidence.

Relativity-the speed of light is the upper limit of speed; At the same time, pay attention to any facts, experiments,

Data, ready to modify the existing theory. After all, Einstein's achievements will not be the pinnacle of human knowledge.

/kloc-at the end of 0/9, people thought that our world had been fully understood. "In the basically established science,

In this building, later physicists only need to do some repair work on another star; "But this is because theory can't.

It explains Kelvin's so-called "two dark clouds"-thermal radiation and Michelson experiment, but it triggered the earthquake at the turn of the century.

Theoretical changes that shake the whole natural science community. This is the birth of quantum theory and relativity; History and facts tell me again

Student: Human's understanding of the world is an endless process; Besides, as long as we look at the history of science, we will know that no matter how good it is.

Even a genius's guess is just a guess, and the progress of science can only be verified by down-to-earth experiments.

Another century has arrived, and we human beings are facing new challenges. Look at the history of science, we didn't.

Modern superstitions such as new spiritualism, new astrology and Dafa can disturb people's thinking.

Excerpt from Sawyer's Hot Topics No.369.

Sender: Pending

From the imagination that relativity can't explain

Any theory has its scope of application, and relativity is no exception.

Please think about the situation of "black hole": at present, the existence of "black hole" can only be confirmed theoretically.

Because we can't see it, we can only rely on other evidence to infer the position of the "black hole" in the observation. Its gravity is strong enough to connect light.

Can't escape, then, at what speed does matter move inside? Interaction between substances

What is it like?

I don't think relativity can properly explain this state.

Another obvious example is the birth of the universe. At present, the most reasonable explanation is the "Big Bang" theory.

Theory: The universe originated from a "singularity" with unimaginable material density, which exploded in a very short time.

Throwing matter around, forming the embryonic form of the universe, after a period of evolution, forming the current state of the universe. no matter

Both the "open universe" model and the "closed universe" model support the formation process of the above universe. so I ... ...

Thinking: At the moment when the "explosion" just happened, did the material be thrown out faster than the speed of light?

If it exceeds the speed of light, then superluminal matter exists and can only be realized under certain conditions.

. If not, then these substances must be moving at infinitely close to the speed of light. Here, I will call them for the time being.

It's sublight.

I assume that superluminal speed does not exist, and the maximum moving speed of an object is "sublight speed".

It takes about 30 billion earth years to form the present universe. (The data are calculated according to different theories.

In other words, the farthest distance from the explosion point is 30 billion light years.

Right (moving at sub-light speed).

At present, the celestial bodies that can be observed by the largest radio telescope on earth are about 20 billion light years away from us. this

There is a problem in the universe: suppose the universe is a sphere a with a radius of 30 billion light years; With the earth as the point, 20 billion light years.

Take sphere b as the radius. There are three relationships between sphere b and sphere a.

The first is tangency or separation. This is absolutely impossible. The earth can't go beyond the universe.

The second is the intersection. Part of sphere B is outside sphere A, which means that some celestial bodies around the earth are in the universe.

Out of range. Such a situation is also impossible.

The third situation is tolerance. Sphere b is completely contained inside sphere a, but at this time sphere b will occupy the size of the known universe.

Part! Is this possible? Have we humans been able to observe most of the universe? Is the universe only quite small?

Can't you detect a part of it? This statement is not supported from the perspective of common sense or actual observation.

Then, the above three possibilities are not established, and we can only go back to the starting point: the matter from the explosion point travels at' sub-light speed'

The movement is not established. The matter starting from the explosion point should form the prototype of the universe in an instant. At this time, the material transportation

The speed of motion may be several times, dozens or even hundreds of thousands of times the speed of light, which may form such a vast space in an instant.

Space. This in turn shows that superluminal is possible.

The "Big Bang" theory is generally accepted in astronomy and astrophysics, and is considered reasonable. And there are

There is considerable evidence to support it. For example, the background temperature of the universe, the similarity between the crab nebula and the expansion of the universe and so on.

In my opinion, doubts about any theory, or speculations about anything that can't be proved for the time being, must stand on the existing basis.

. Put forward a reasonable but bold explanation. Relativity is definitely not the ultimate theory, it must have a range that cannot be reasonably explained.

However, it can't be overturned just by shouting' Relativity is not absolutely correct'. Doubt alone cannot solve everything.

Is there a problem? I sincerely hope that this forum can produce a scientist who overturns the theory of relativity.

Excerpt from Sawyer's Hot Topics No.369.

Sender: You

Theory has its scope of application.

I can't help but say a few words after reading so much discussion about superluminal. First of all, I'm not studying physics.

Someone has answered the question about the speed of shadow movement. But everyone seems to have overlooked one fact: the shadow.

Children are caused by some light being blocked by objects, and the change of light causes the change of shadow! It is assumed that the light source is cast

The incident angle or position of the shadow-generating object has changed, so if the affected light does not reach the projection plane,

In fact, how can shadows change? Isn't that ridiculous?

Secondly, it is a scientific attitude to Carcy to "doubt the existence of unobservable things".

Religious belief! "I beg to differ. I don't know what he means by "observing". I believe it's not enough.

Narrow enough to "see" with the naked eye? But in the article, he seems to put "a pair of particles that are far apart can really be sent."

Biological interaction is called unobservable because it is only interaction and there is no material transfer. therefore

What is "gravity"? Who can observe?

We can only confirm the existence of objects from their interaction, can't we? In addition, electromagnetic wave, magnetic force

Isn't the field really waiting? Strictly speaking, the so-called "observation" of calmsea is not just the truth of the naked eye.