Bright Sword starts with the grenade flat.

Chapter 521: The Overturned Theory of Relativity

So based on Einstein's theory, we can draw a conclusion that the blue star revolves around the sun not because the blue star and the sun attract each other, but because the sun bends the space, so the blue star has no way to escape and keeps revolving to prevent itself from falling into the sun.

Since the essence of gravity is the curvature of space, it doesn't matter whether there is mass or not. As long as there is a curved space, stars or anything else will move along a curved trajectory. This is why light, which has no mass, will also bend when it approaches something with mass. So as long as there is something with mass, the space around it is curved.

Because the theory of relativity perfectly explains what Newtonian mechanics cannot explain, Newton's law of universal gravitation has been dethroned, and the theory of relativity has become popular ever since.

Of course, Einstein also made a great contribution to gravity, which is that he predicted the existence of gravity waves. Gravity will cause the distortion of space, so when an object with gravity moves in space, it will bring some fluctuations to this space, just like when a ball moves on the water surface, the water surface will produce ripples, and these ripples are gravity waves.

However, according to calculations, gravitational waves are very weak. Even if the mass of an object is very large, the fluctuations in space distortion it can cause are very small. Only when supermassive celestial bodies such as black holes or neutron stars collide, the gravitational waves they produce can be detected by us.

But even if the gravitational waves generated by the collision of black holes are too far away from us, they are already very weak when they reach our place, so weak that it is equivalent to detecting a fluctuation of the diameter of a proton between the blue star and the sun, so it has always been believed that it is impossible to detect. Moreover, when black holes collide, the black holes do not emit light, and all the light is sucked into them, so we cannot see them collide, we can only detect the gravitational waves and find that they collide.

So even though Einstein predicted the existence of gravitational waves in 1916, no one has been able to discover this type of gravitational waves for nearly a hundred years.

However, it was not until the 21st century that Miedz detected for the first time a gravitational wave coming from 1.3 billion light years away. This gravitational wave was produced by the collision of two black holes. This also proved Einstein's prediction, indicating that space is really soft and can fluctuate.

Of course, the reason why gravitational waves can be detected is naturally because an instrument to detect gravitational waves has been built.

The instrument used to observe gravitational waves this time is super huge, with two four-kilometer-long arms. There are two such buildings in total, one in the northwest corner of Mizhuo and the other in the southeast corner of Mizhuo. Both machines are used for detection at the same time.

Since this fluctuation is very small, it is only by detecting this fluctuation on both sides that it can be proved that it does exist. Of course, many gravitational waves were detected after its construction.

You should know that gravitational waves are only produced when black holes collide. It was originally believed that there were not so many black holes in the universe, but this shows that black hole collisions in the universe are very frequent, and there should be a lot of black holes.

Therefore, we can conclude that all the dark places in the universe are black holes, and gravitational waves come from the collision of black holes. However, light cannot be emitted when two black holes collide, but gravitational waves can. Of course, after the Wandering Blue Planet successfully discovered the space jump technology, it sent out many detectors.

Then it was naturally discovered that in addition to the largest black hole in the center of the Milky Way, there are indeed many small black holes.

When black holes collide, a larger black hole will be produced, which is equivalent to the merger of two black holes. Therefore, the black holes in the universe will become larger and larger, and finally become one big black hole, and the universe will shrink.

Of course, although Einstein's theory of relativity explains why light is absorbed by black holes and supplements the defects of Newton's universal gravitation, Einstein's theory of relativity is actually not perfect. One of its flaws is that it cannot explain singularities. Singularities are things with infinite mass. Einstein's theory of relativity cannot calculate infinite things, and even if it can calculate, it cannot see singularities, so it is unknown whether the calculation results are correct.

Therefore, the theory of relativity has no solution to the singularity. Einstein was unable to solve this problem until his death, so Einstein denied the existence of black holes in his later years. Of course, for the sake of Einstein's reputation, this matter is generally not mentioned again.

After all, no matter what, Einstein's contribution to the scientific community is very great. At least the foundation of secondary civilization and the discovery of nuclear energy cannot be separated from the support of Einstein's theory of relativity.

So it says that Einstein once predicted the existence of black holes, but it does not say that he denied the existence of black holes in his later years, because the theory of relativity cannot explain black holes. So he thought that the things he predicted did not conform to his theory, so he excluded them. He thought his prediction was wrong. Einstein was admitting various mistakes in his later years. In fact, many of his previous theories were wrong, so he kept admitting his mistakes in his later years.

However, can we explain why the singularity is so important?

Because as a theory that can explain everything in the universe, there cannot be any loopholes. This celestial body clearly exists in the universe, but how can it work if it cannot be explained!

In other words, if there is a theory that can explain everything in the world, it means that the world has a unified law. If everything in the universe has a unified law, it will produce a result, that is, the future is certain, because the existence of laws means that the past can determine the future.

And this is the core of the most basic materialistic thought of the scientific spirit, rather than the idealistic theory that God said, "Let there be light," and then there was light. Everything that cannot be explained is attributed to God's creation and God's gift, rather than trying every means to explore why it cannot be explained, whether it is because there are some rules that are not understood, or whether the discovered rules are wrong, such as gravity, geocentrism, the round earth and the flat sky, etc.

For example, the simplest weather forecast is actually based on patterns. If patterns exist, we can look at past data to infer future data. Through the patterns, we can know that the sun will rise from the east tomorrow.

So if the law exists, the future is predictable, that is, the future is certain and the cause and effect are certain, if there is this cause, there will definitely be this effect. But on the other hand, if the singularity does not conform to the theory of relativity, then the future is not certain, and the cause-effect relationship collapses, that is, the cause can no longer determine the result.

Because the singularity cannot be explained, if there is an exception, it means that the formula is wrong. Even if it can explain all other phenomena, it also means that the formula is wrong.

The law of universal gravitation has fallen from its pedestal because there are many situations that it cannot explain, and those situations do not exist in our real life. It cannot explain black holes or light. Logically, it has no impact on our lives, but it cannot explain the laws of the entire universe.

Fortunately, after studying the space weapons of this prehistoric civilization, the scientists of the Wandering Blue Planet finally figured out why black holes explode and what the singularity is. They also overturned the argument that speed affects time and redefined time and space.

(End of this chapter)