As for the theory of relativity, a brief discussion through history! 50

The speed of light is constant in any frame of reference, this is the first postulate of relativity, and there is no point in discussing relativity outside of the premise....It is impossible for a person to run faster than the speed of light to the front of the timeline....

Therefore, people can go to the past, but it is impossible to go to the future (this is proven), and time is originally a measure made by people themselves, and I personally think that this will cause the inevitable narrow-mindedness of researchers....

Isn't a wormhole only 1 molecule in size? The intersection of two 3-dimensional spaces is a plane, and it is impossible to cross it when it is extremely curved, and it is unlikely that a large scale will occur.

Human time is designed based on the earth's cycle, starting from the original year of the human Gregorian calendar.

Each intelligent creature that develops independently in the universe will have its own time, which can be infinite.

The history of the distant stars we see is not necessarily the real history, which needs more research, but this question can be put aside, let's first study the near planets and the sun, these celestial bodies that are closely related to us.

Correct several mistakes of the landlord:

1.Wormholes are a product that has only existed theoretically so far, and it has not been observed in reality or has not been proven.

2.The speed of light is always constant in any state, and no matter who the reference is, you may ask, doesn't this make these references contradictory? It is precisely because of this contradiction that the theory of relativity can be derived.

3.The time of the universe is certain, but in different local universes, the cosmic constants are different due to the different forms of material motion, resulting in inconsistent speed of time.

4.Theoretical research is generally only at the level of 4 dimensions, and the level of higher dimensions is not enough, we know that the more dimensions, the more basic parameters, and many theories are invalid there.

Theoretically, not every black hole can travel through space (the so-called wormhole), there are two kinds of black holes, one is the giant star black hole caused by the collapse of the acquired star, this kind of black hole cannot become a wormhole; The second is that the black holes that were created at the beginning of the universe, that is, the primordial black holes (small black holes), are possible for wormholes. What the primordial black hole absorbs is spit out to another space through a highly distorted channel in space, and the protruding place (i.e., the opposite of the black hole) is the white hole, and this channel is the wormhole.

Our study of 4-dimensional space is to introduce the concept and graphics of the light cone, nothing can pass through the light cone, because there is no matter faster than the speed of light, so we can't detect anything outside the light cone, but the wormhole is a special case, it can pass through the light cone, that is, it can reach other spaces.

Since mathematics has imaginary numbers, it is possible to make the particles of matter move faster than the speed of light (virtual particles, or tachyons), which can cause time to go back in time.

Back to the landlord: It's the first time I've heard that the speed of light in the universe can be changed, so it seems that Einstein's relativity hypothesis is not right, in fact, you already doubt whether all the theoretical assumptions are correct, because these things are impossible to verify, and there is no intention to argue, ** only. In addition, you say that time is a man's custom, this happens to be idealism, and it is subjective idealism, my philosophical position is constant, I am a dialectical materialist, so I disagree.

What we see is the past of the planet in outer space.

The same outer space planets see only our past.

Even if people from outer space planets teleport to us, they can only see us now.

But they will think that they have reached the future.

500 years later, the game world will reach a state of reality, and then the game will be like a small universe that can send all commands.

You can teleport, the time difference is a p.

I mentioned the Lorentz transform, which is the most basic formula of special relativity.

The inference of this formula leads to some interesting conclusions that are different from what we have previously recognized.

Shortening of the length For example, in the reference frame S, which moves with velocity v relative to the reference system S, there is a ruler with a length of l that extends the x-axis, and if the ruler is placed on the x-axis according to the Galilean transformation (classical physics), the length of the ruler is l., regardless of which reference is not tied or not

But in the Lorentz transform, the observer of the S system still measures the length of the ruler L, but the S frame of reference considers the length of the ruler in the S system to be L = L (1-b 2) 1 2 because (1-b) 1 2 1

Damn, it's too difficult to express the mathematical formula here, and the conclusion is that when the S system observes the S system, the length of the extended motion direction becomes shorter.

This is known as the Lorentz contraction.

This is still relatively difficult to understand, for example, Xiang Jianna.

Suppose there is a very fast spaceship, its speed relative to the earth is v=95% of the speed of light, don't ask me how to accelerate), if the spacecraft is used as a reference frame, the length of the spacecraft is measured to be 15m, ask: with the earth as the reference frame, how long should the spacecraft be?

According to the Galilean transformation, this length does not change, but according to the Lorentz transformation: l = 15 * (

That is, in the frame of reference on Earth, the 15-meter spacecraft has been severely shrunk to less than 5 meters.