Why does special relativity hold that the speed of light is constant in both space time and space fo

First of all, the speed of light is predicted by Maxwell's four equations (which can predict all electromagnetic phenomena) is the upper limit of speed, but this goes against the traditional concept, just like when you ride in a car, although you are stationary relative to the car, it seems that you are moving on the ground, but the speed of light will not change, so scientists are trying to find the kind of medium (called ether) where Maxwell's equations are established, and because it is a medium, the medium will move internally (like the flow of water, undercurrent), which will cause the speed of light to change, So there is a famous Michelson experiment in history, which uses this principle, but experimental monitoring found that no matter which direction, the speed of light remains the same, so Einstein decided to abandon the original theory, establish a new theoretical system, and put forward the theory of relativity with the speed of light unchanged as the fundamental assumption.

Because the experiment proves that the speed of light is constant, from this phenomenon, the special theory of relativity starts from this point, and mathematically proves that the weight of matter, space-time and space are relativistic.

Because experiments have proved that no matter what direction and state you use to test the speed of light, the conclusion is the same, and it seems that this is the case, but I don't know too much.

Yes, the speed of light is the same size in any frame of reference, it's hard to imagine, hehe, it's completely different from Galileo's geometry, it's pseudo-Euclidean geometry.

Because no matter what frame of reference we look at the speed of light, its speed is constant! We all know that for the entire development of human civilization, the greatest role has been played by those scientists who have worked hard and worked hard for the development of science and technology! It is their tireless research;

After discovering modern science, human beings have changed their lives rapidly in hundreds of years, making the earth's civilization unique! And the closest generation of academic bulls to us must be the famous physicist Albert Einstein in the last century!

In the words of Mr. Yang Zhenning, Einstein is the only scientist who can rival Newton, the founder of physics! The three pillars of physical theory of the last century: special relativity, general relativity, and quantum mechanics, Einstein played an irreplaceable role in their formation!

In particular, in the "special theory of relativity", Einstein introduced the principle that the speed of light is constant, and the principle that the speed of light is the upper limit of the speed in the universe, which completely subverted our previous view of time and space! However, as we all know, human beings have not yet fully understood the mysteries of the speed of light and the photon.

So, why did Einstein assume that the speed of light is constant? The answer is simple: whenever and wherever we look at the speed of light in any frame of reference, its speed remains at a constant level, that is, close to 300,000 kilometers per second; Later, with the establishment of Maxwell's equation;

The principle of the invariance of the speed of light has been successfully confirmed by the physics community. It can be said that since the joint solution of Maxwell's equations has been calculated, "the speed of light does not change" is no longer a hypothesis, but a fact.

Therefore, many people believe that the speed of light may determine the tectonic stability in the three-dimensional space we live in. In other words, if we can truly transcend the speed of light, perhaps it is no longer impossible to "transcend time" and even travel to other multiverses!

Because assuming that the speed of light is changing, then there will be many situations to consider, and it will be very difficult to take the theory to the extreme.

Since the speed of light is the fastest of the known speeds, if the speed of light is assumed to be constant, it is possible to infer beyond the speed of light based on the theory of relativity.

The particularity of the speed of light is reflected in the propagation speed of the law of cause and effect, so Einstein's special theory of relativity concisely explains that the speed of light is always constant, but in fact reflects the absoluteness of the law of cause and effect. In the other line of physics, quantum theory, due to the wave-particle duality, the concept of photons arises, and the mass of the photon at rest is equal to zero. Therefore, the peculiarity of the speed of light is also reflected in the fact that the mass of the photon is zero when it is at rest, just in a hypothetical state.

Or, the mass of the object itself limits its speed and does not reach the limit.

The speed of light is ever-changing. Because the light emitted by a specific light source is always subject to specific conditions.

It's not easy to understand mathematically, but it's true that the speed of light doesn't change, because when you observe the light wave fluctuations of light, you find that it's the same in different coordinate systems, in inertial frames (this experiment has been proven to be correct), and then there's a basic error in your problem! The opposite speed of light for the Flash is w+v (1+wv c 2) are two speeds, times the speed of light, and the same direction is to treat v as a negative value, and the solution is still 1 times the speed of light (the above formula is due to the Lorotz transform). You're talking about using the Galilean transformation, where two velocities are directly added and subtracted.

But the Galilean transformation in classical mechanics is incomplete (because the speed in classical mechanics is so much smaller than the speed of light, so even if it is ignored, it will not be obvious), but it turns out that the theory of relativity is correct (as evidenced by the motion of the stars).

Let's briefly talk about the origin of the principle of the invariance of the speed of light.

Originally, it was Maxwell's equations for electromagnetic waves in a vacuum, and that frame of reference was not specified, that is, no matter which frame of reference calculated the speed of light propagated by a vacuum, it was a constant c, and of course your Flash calculation was also c.

At first, people could not accept this fact, so they assumed that the medium of light propagation in a vacuum was the ether, and then assumed that the ether was absolutely stationary, and began to look for the ether. As a result, the experiment of finding the aether proves that the aether always moves with the reference frame, that is, no matter what the state of the reference frame is, the aether is at rest with respect to the reference frame, which is equivalent to the aether being at rest with respect to all reference frames. So aether is a redundant concept.

You can understand it this way, the vacuum is stationary with respect to all reference frames, so the propagation of electromagnetic waves (light) in all reference frames is the velocity of the medium + the speed of light (the velocity synthesis of special relativity is not considered here), while the medium is a vacuum, and the velocity is always 0, so the speed of light is always c.

Ultimately, the constant speed of light is an experimental fact, so it serves as a principle, a basic assumption. Experimental facts do not need to be proven.

Unless one day a more fundamental principle, or experimental fact, is discovered, and then the speed of light can be deduced from this principle.

It is also explained here that the speed of light in water, in glass, and in air is not constant for different frames of reference. This is because only the vacuum is a medium at rest for all frames of reference. The speed of light in other media, synthesized with relativistic speeds, can be calculated.

It's a law, and I don't know why, or how it came about. In short, this is the case, and the experiment proves it. The speed of light is c constant in all inertial coordinate systems, and is within the Flash's inertial coordinate system.

No matter how much he moves the light for him or c, you can't describe it in your inertial coordinate system, you have to describe it in the coordinate system of that Flash. So, you have to ask which one is the result of two distances. If you want to say why the distance between the two people is different for the distance between the two people, there is a clock-slow effect in the theory of relativity, you can go and see his results to understand it, it's not very difficult to understand.

The theory of relativity calculates relative velocity at high velocity like this.

A's velocity + B's velocity) [1 + (A's velocity + B's velocity) divided by c].