Bright Sword starts with the grenade flat.

Chapter 440: The Limit of the Speed ​​of Light
Of course, conventionally speaking, we can only get infinitely close to the speed of light, and can only reach 99% or 99.99% of the speed of light. After all, Einstein's theory of relativity is there.

Although the planet-level superconducting electromagnetic cannon is only 20 percent faster than the 70 percent light speed of the antimatter engine spacecraft, the two are not comparable in terms of power.

The speed of light limit is one of the most famous and basic principles of physics in the universe so far. Even though Liu Xiu and his wandering blue star have experienced several civilizations, including several blue star-like civilizations cultivated by the Engineer Civilization, including the Engineer Civilization with tens or even millions of years of history, they have not found a way to directly break through the speed of light. Perhaps the failure to find a way to break through superluminal speed is one of the reasons for the decline of the Engineer Civilization!
Of course, the method of directly breaking the speed of light mentioned here refers to breaking the speed of light through normal acceleration, rather than using a curvature engine to take shortcuts and bypass the speed of light limit to achieve superluminal navigation.

After all, the curvature engine uses gravity to distort space to reach superluminal speed, which also means that the kinetic energy of the object at superluminal speed does not actually increase. Once the curvature engine stops working, the object will return to its original speed.

According to Einstein's special theory of relativity, the speed of light in a vacuum is 299,792,458 meters per second, which is the speed limit in the universe.

Therefore, if you want to exceed the speed of light, you need extremely high energy and special conditions. But why is it impossible for an object to exceed the speed of light? In fact, there are three reasons why an object cannot directly exceed the speed of light. As long as these three problems are solved, the object can exceed the speed of light.

The first problem is the energy limitation, because in order to accelerate an object and exceed the speed of light, a large amount of energy is required. As the speed of an object gradually approaches the speed of light, the energy required will continue to increase. When the speed of an object is infinitely close to the speed of light, the energy required will infinitely tend to infinity.

This means that even if humans can obtain enough energy to accelerate an object, they cannot achieve relativistic speeds because infinite energy is simply impossible to achieve, unless there are infinity gems like those in Marvel movies that can supply unlimited energy to provide it with energy.

It's a pity that not to mention that the universe Liu Xiu is in is not the Marvel Universe. Even if it is the Marvel Universe, according to Liu Xiu's knowledge, the energy of the Infinity Gems is not infinite. Instead, it is the energy of the Marvel Universe that is drawn, so it creates an effect similar to infinite energy. Once the energy of the Marvel Universe is drawn, the Infinity Gems will no longer have infinite energy.

In addition to the first problem of energy supply, there is a second problem in achieving superluminal speed, which is the problem of the GZK limit value. Scientists who study superluminal speed have discovered that there is a GZK limit value in the universe that prevents objects from exceeding the speed of light.

That is, when the energy carried by microscopic particles reaches 5×10^19 electron volts, they will interact with photons in the cosmic microwave background, causing energy attenuation.

So this means that no matter how high the energy is, it is impossible for any particle to reach or exceed the speed of light. Even if the cosmic microwave background radiation disappears in the future, the energy of the particles will decrease as the universe expands, making it impossible to exceed the speed of light.

In addition to the above energy and limit threshold issues, the more important point is the third problem that cannot be avoided when wanting to exceed the speed of light, that is, the mass increase effect in the relativistic effect.

Einstein's theory of relativity states that as an object's speed increases, its mass also increases. When an object's speed approaches the speed of light, its mass tends to infinity.

Therefore, to continue to accelerate objects, infinite energy is required, which is impossible to achieve. After all, how can infinite energy be found? Not to mention the issue of whether there are infinite gems, even the energy of the entire galaxy or the entire universe is not infinite but finite, so fundamentally there is no such thing as infinite energy. In addition, the greater the speed, the more time and space will change. When the speed is infinitely close to the speed of light, time will become relatively static and the spatial dimension will tend to zero. This situation cannot exist in the real world.

Of course, if we can really reach superluminal speed from the front, then perhaps we can jump out of this universe, or this latitude.

And the most crucial thing is that even if it is impossible to exceed the speed of light, it will not affect Liu Xiu's construction of a star-destroying electromagnetic cannon. After all, in reality, if it were not allowed, what Liu Xiu wanted to build was not a star-destroying laser cannon, but a star-destroying electromagnetic cannon.

You should know that the biggest reason why Liu Xiu chose laser weapons instead of electromagnetic weapons was that the recoil of electromagnetic weapons was too large. At that time, Liu Langcai had just arrived on Pandora not long ago, and there was no time to cool and reinforce the mantle and the core of the earth.

In fact, to be honest, if Liu Qi had not wanted to transform the planetary engine, Liu Xiu would not even dare to think about cooling the mantle and core to increase the number of wandering blue planets. After all, cooling the core and mantle is a huge project.

You should know that the project of cooling the mantle and core took more than ten years to complete, and the technology of the Wandering Blue Planet at that time was not comparable to the technology used to build the planetary engine a hundred years ago.

At this time, the Wandering Blue Star not only has large-scale engineering mechas, but also has nuclear fusion reactors, antimatter reactors, antigravity systems, and large transport ships that can easily carry out interstellar mining. So in terms of current construction capabilities, it can build millions of planetary engines within ten years.

But there is no other way. After all, the most important step in cooling the mantle and core is to dig cooling wells that can reach the center of the earth! And it’s not just one or two, but tens of thousands of such cooling wells with a depth of thousands or even more than 10,000 kilometers!
And that’s not all. Countless geothermal exchange pipes with a length of tens or hundreds of kilometers have to be inserted into the walls of these cooling wells to absorb heat from deep within the earth’s core and cool the high-temperature magma in the mantle and the metal substances in the core that have become liquid due to the high temperature.

Of course, it is precisely because of this that the now cooled mantle is filled with geothermal heat exchange tubes made of metal. When the magma cools down, it naturally becomes solid rock. Then, with the addition of geothermal heat exchange tubes that act as steel bars, what is the difference between such a structure and reinforced concrete?

It is precisely because of this that the overall strength of the Wandering Blue Planet today is a world apart from the strength when it was only wrapped in a thin layer of crust.

It is precisely because the strength of the Wandering Blue Planet is now sufficient, coupled with the cooling wells that are more than 10,000 kilometers long, isn’t this just the acceleration track for the electromagnetic railgun!

Therefore, it is only necessary to lay superconducting acceleration coils in the cooling well, and naturally there is no need to worry about other issues such as whether the Wandering Blue Planet can withstand the recoil of the electromagnetic gun.

(End of this chapter)