Bright Sword starts with the grenade flat.

Chapter 441: The fastest martial arts in the world cannot be broken
The main reason why Liu Xiu wanted to develop an electromagnetic cannon was that he was dissatisfied with the power of the star destroyer laser cannon built on Pandora, also known as Proxima Centauri, and the shortcomings of the star destroyer laser cannon were too obvious.

The first point is the issue of power. Although the laser star destroyer cannon shattered Blue Planet No. 2 with one shot, it left a large number of fragments, so that the crustal fragments carrying the Zerg flew all over the universe. Pandora was destroyed because of the problem of fragments.

Therefore, if the star-destroying laser cannon had been able to destroy stars instead of planets, such as directly blowing up the star with one shot and using the temperature of the star's explosion to roast Blue Planet No. 2, then there would be no need to worry about the Zerg flying around along the crustal fragments.

However, the actual situation is that it is difficult to increase the upper limit of the power of a laser cannon. You must know that in order to achieve the effect of destroying a star with one shot, the caliber of the star-destroying laser cannon has been increased to a diameter of one hundred kilometers.

Therefore, according to this result, if you want to destroy a star, let alone a hundred kilometers, even a laser cannon with a diameter of ten thousand kilometers will be of no use to a star with a diameter of more than one million kilometers.

But electromagnetic cannons are different. Because of the mass increase effect, they do not need a caliber that is too large. As long as the speed of the electromagnetic cannon shells can be increased, the power can be immediately multiplied several times, or even hundreds of thousands or even hundreds of millions of times. There is no need to compete with the caliber like a laser cannon.

Even an embroidery needle can be enough to destroy a star as long as the speed is high enough.

Before Liu Xiu traveled through time, there was a question that often appeared on the Internet: What would happen if a needle hit a blue planet at the speed of light? Would the blue planet be destroyed? Although this question seems boring, it contains a very profound scientific theory.

If an ordinary person answers this question, they will think it is ridiculous that a needle cannot possibly destroy such a big blue planet. However, if a physicist answers it, he will actually tell you that if a needle reaches the speed of light, it can pass through the blue planet as freely as an embroidery needle passing through embroidery cloth, and can easily and directly pop the blue planet like a balloon!

Unfortunately, this is just a joke and should not be taken seriously, because such a thing will never happen, because according to existing physical theories, objects will never be able to reach the speed of light.

However, it is not possible to reach the speed of light, but it is theoretically possible to approach the speed of light. After all, a collider can bring atoms or protons close to a light beam and reach 99.9 percent or even more of the speed of light.

The speed of light is the highest speed in our current cognitive world. Only objects without rest mass, such as photons, can reach this speed. Objects with rest mass cannot reach this speed.

This law of the universe was discovered by Einstein more than a hundred years ago. Many scientists had doubts at first, but after more than a hundred years of observation, experimentation and testing, no one has broken this spell.

Whether it will be broken in the future is unknown, but at least this speed ceiling has been recognized by the scientific community. The speed limit and the theory of the constancy of the speed of light have become the basis of all modern scientific theories. The speed of light is a constant in many physical theorems and formulas. If the speed of light theory changes, the entire physical theory, including quantum mechanics, will have to be rewritten, and the entire human civilization built on modern science will also collapse.

Of course, if it really collapsed, and the murderer who pushed down the building was the human beings on the wandering blue planet, then it is conceivable that the new scientific building rebuilt after the collapse will inevitably be taller, and the human beings on the wandering blue planet will inevitably enter a more advanced civilization sequence.

So far, the most accurately measured speed of light constant is 299,792,458 meters per second. The theory why this needle cannot reach the speed of light is very simple, it is called the mass increase effect.

This is a concept in relativistic mechanics, also known as the mass-velocity relationship. This theory holds that the inertial mass of an object is divided into rest mass and relativistic mass, which can also be called dynamic mass. When an object moves, there will be a mass increase effect, which is one of the relativistic effects. In the mass-velocity relationship theory, photons have no rest mass but have dynamic mass, so light pressure is generated. In nature, in addition to photons that have no rest mass and matter that moves at the speed of light, there are also gravitons that are the medium for propagating gravitational waves.

Gravitons have no rest mass, so gravitational waves are also the speed of light. By using directional gravitational waves to distort space, a curvature space separate from conventional space is formed. The superluminal flight formed in this way is curvature flight.

In addition, no matter has been found without rest mass. Some people once believed that neutrinos have no rest mass and move at the speed of light. Later studies believed that the rest mass of neutrinos is greater than zero and their speed is only close to the speed of light.

Then according to the mass-speed relationship, what will happen if an object with rest mass reaches the speed of light? The conclusion is that it will lead to infinite mass-energy.

What is infinity? That is to say, the universe is also finite. Any matter reaching the speed of light, including the kinetic mass of a proton, will become infinite, greater than the total mass-energy of the universe. Therefore, even if there are infinite gems that can mobilize the energy of the entire universe, they cannot provide normal superluminal speed.

Therefore, it is a paradox in itself for an object with rest mass to reach the speed of light, which means that if such a thing really happens, the universe will be destroyed.

The theory of relativity believes that the mass of matter in motion follows the mass-velocity relationship, and its calculation formula is: M=m/√[1-(v/c)^2]. Here M represents the mass of matter in motion, m is the rest mass of matter, v is the speed of the object, and c is the speed of light.

According to the mass-increase effect of relativity, any object with rest mass cannot reach the speed of light, but can only get infinitely close to the speed of light. Scientists use huge energy to accelerate proton beams in large accelerators. When the power of the proton beam reaches 70000 billion electron volts, the speed reaches 99.9999991% of the speed of light, which is the current world record for the speed of an artificially created object with rest mass.

然而比原子还要小很多的质子有多少质量呢！其只有1.6749286*10^-27kg，也就是约1675亿亿亿分之一公斤，一根针尖上可以排列30万亿亿个质子。

When a proton reaches such a high speed and such a high energy, its force is equivalent to that of a mosquito flapping its wings. Imagine the force of 30 trillion trillion mosquitoes flapping their wings! And this is only 99.9999991% of the speed of light.

The mass increase effect calculated based on the mass-velocity relationship formula is roughly that when the object's speed reaches 0.9999 times the speed of light, the object's dynamic mass can reach 70 times its rest mass. When it reaches 0.99999999 times, which is the speed of protons in the Large Hadron Collider, the dynamic mass is 7071 times its rest mass. Every time two 9s are added to the end, the dynamic mass increases by an order of magnitude, that is, 10 times.

Therefore, when a needle approaches the speed of light, how large is its kinetic mass!

This can be calculated using the mass-speed relationship formula. An ordinary sewing needle weighs about 0.15g. When it reaches 0.99999999 times the speed of light, the kinetic mass increases by 7071 times, so the kinetic mass of the needle exceeds 1kg. This mass seems small, so it seems that nothing will happen to the blue star under this speed collision.

Perhaps under such a high-speed collision, the high temperature generated will produce the fusion effect of matter, but even the energy released by 0.15 grams of fusion matter with a fusion effect cannot be compared with that of a little boy. It seems that the power of an embroidery needle that can solve the speed of light is just like this.

(End of this chapter)