Greetings, Mister Principal: General Relativity

It only takes a genius one second to remember the address of this website: (Vertex Chinese), the fastest updates! No ads!? "General Relativity..."

Your Excellency Braggs gently read the name of this theory and felt that there was some attractive power in it.

"In addition to some conclusions of the special theory of relativity, the general theory of relativity also extends two principles."

Reiner explained further.

"The first is the equivalence principle, that is, the dynamic effects of the inertial force field and the gravitational field are locally indistinguishable, because under the framework of general relativity, gravity is not a force in the traditional sense, but It is the interaction caused by the distortion of space-time caused by mass, and the equivalence principle drags gravity back into the original scope of discussion. Under certain limiting conditions, gravity can still be discussed as a fundamental force."

The equivalence principle is actually a bridge between classical magic and the magic system under the framework of relativity. Just like Alberton mechanics is similar to quantum mechanics at macroscopic low speeds, this principle combines the principles proposed by Lord Alberton. The law of universal gravitation regulates general situations, and special cases are discussed separately.

"The second is the general principle of relativity, that is, all physical laws take the same form in any reference system. Compared with the previous special principle of relativity, the general principle of relativity expands it from the inertial system to All reference systems are also an indispensable cornerstone for mages to pursue truth."

After redefining gravity, the principle of special relativity can naturally be expanded into the principle of general relativity. The meaning of this principle is the formula derived by the mages. The form of the determined theorem is unified in any reference system. , in other words, there is truth in this world, and the theory will not be different due to different reference systems.

After talking about the two basic principles of general relativity, Reiner glanced at the Netherworld Gate not far away.

“The phenomenon of gravity and space-time distortion reminds me of the goldfish in the fish tank. If goldfish also had human intelligence, they would see a distorted view of the outside world through a spherical fish tank, but for This is normal for a goldfish that has grown up in a fish tank."

He paused and then spoke.

"If a goldfish is lucky enough to leave the fish tank without dying, it will see the 'normal' world, which is contrary to its original understanding, but this is the real world, and its previous understanding The reason why there is a deviation in knowledge is because of the existence of the fish tank."

Reiner's words caused the mages to fall into deep thought. Now it seems that the fish tank is obviously a gravitational field, which is the distortion of space and time caused by massive objects.

During the distortion of space and time, the path of light will change, so the measured speed of light will also be different. The speed of light, under the framework of the theory of relativity, is a constant of the universe.

In other words, even the constants of this universe may not be fixed. No one knows whether there is a black hole in the galaxy where this planet is located, and the space-time distortion it brings changes the speed of light.

When people laugh at the goldfish in the fish tank, can they imagine that they might be in a bigger fish tank?

But the general theory of relativity tells the wizards that even if the constants are different, the physical laws are the same form in any reference system. At least the laws mastered by the wizards are universal.

The significance of this is extraordinary.

This means that although the mages are physically restrained in the fish tank, their minds have touched the complex and chaotic world outside. This is a victory for the mind.

The two legendary mages felt a little emotional. What they had been pursuing their whole lives was such a truth. At this moment, it was proposed by a young mage. While they were relieved, they were also a little regretful.

After Reiner concluded the general theory of relativity, he also had mixed feelings.

After he mastered powerful magic and reached the pinnacle of personal strength in this world, he actually observed the bending phenomenon of light and even came into contact with the black hole-like gate of the netherworld based on traceable ideas. , the general theory of relativity of this world was derived.

But in another world, a young man could sit at his desk and gain insight into the truth of the universe just through calculations with pen and paper.

What wisdom this is.

After thinking for a moment, Reiner continued.

"Based on the phenomena we have observed now, the original theory of relativity did not take into account the problem of gravity and was flawed. Therefore, it was revised. In the general theory of relativity, we can predict that when the mass of an object is concentrated at a certain point, At that time, the distortion of space-time around it will become so strong that even light cannot escape. I call this point a singularity, and I call this area a black hole."

Leiner’s conclusion is based on reasonable inference supported by general relativity. It is an extreme situation and a prediction.

"Black hole..."

Your Excellency Alberton also thought of the Nether Gate not far from the Abyss Submarine ~IndoMTL.com~ But compared to the dark black hole that Reiner said that even light cannot escape, the distortion in front of him There doesn't seem to be that much gravitational pull.

"Wait a minute, Reiner, if even light cannot escape from a black hole, then we have no way of observing such a celestial body."

Field thought that people's observation of celestial bodies is essentially the observation of the light they emit. Even those stars that do not emit light can be found through spectral analysis, but no light can escape from black holes. Within the framework of the theory of relativity, no information can be transmitted from a black hole, and people have no way of detecting this special celestial body.

"It is true that we cannot observe black holes using conventional means, but under the huge gravity, the surrounding celestial bodies will inevitably have different motion conditions, just like the bumpy roads will inevitably Affecting the operation of the carriage, we can measure the existence and location of black holes through similar situations."

Reiner nodded and continued.

“For example, since a massive object can produce a strong gravitational field, causing light to bend, then we can see through this massive object other celestial bodies that are obscured by it.”

A projection of light appeared on his hand. It was a system composed of several celestial bodies. It can be seen that although the light emitted from distant stars would be obscured by the celestial bodies in the middle according to common sense, due to the strong gravitational field, so The light is bent, and instead the light of distant stars can be seen. In this way, it seems that this massive celestial body is like a lens, reflecting the things behind it.

"This is the gravitational lensing effect."

Reiner said that the moment he mentioned this phenomenon, everyone present immediately thought of an object and had a similar feeling.

That is the Gate of Netherworld.