Re-understanding Einstein

I have known Einstein for a long time. All I knew at that time was that he was a great scientist, that's all. Before writing this article, I only knew some terms related to relativity, quantum science and atomic bomb, but I think it's time to get to know such a great man.

Einstein not only has the craziest hairstyle in the world, but also has the smartest brain. When Einstein was a child, he spoke very late, and the maids at home called him a silly boy, but when he took him to the doctor, he found that he just liked to say complete sentences as soon as he opened his mouth. Young Einstein began to explore the world of everyday life. He once said that two things influenced his early life: one was the compass he got when he was five years old, and the other was the geometry book he received when he was 12 years old. He is deeply fascinated by mysterious phenomena and mathematics.

Einstein's way of thinking is different from others, which makes his relationship with the teacher bad. In fact, in his mouth, the school is a "military camp" and the teacher is a "lieutenant". Because he didn't pass any courses, "Private" Einstein became a high school dropout. He didn't pass the exam of the Federal Institute of Technology in Zurich, Switzerland, but he took it again at the age of 17 and passed it with high marks. But this is because he is still very rebellious and often opposes the teacher. He believes that the education system stifles innovation. He never obeyed the rules, and he often questioned the teacher, which made the teacher very headache. So at the age of 22, he didn't have a job and had a pregnant girlfriend. Fortunately, he found a small job in the Swiss Patent Office, and he called this experience a shoemaker's career. This supplement is seven years. In these seven years, he has been doing what he likes best: thinking.

He thinks that time has had a very positive impact. During this period, he wrote a lot of important papers and finished his work in Patent examiners while thinking, so his work at that time did not have a negative impact, but helped. Because if he stays in academia, there will be a lot of interference.

Einstein's great thought:

Imagine that you are chasing a bus. Its speed is 48 kilometers per hour, while your speed can only reach 47 kilometers per hour. The bus is faster than you 1 km, so you can catch up with it as long as you speed up a little. But if you change the bus into a light beam (about 300 thousand kilometers per second), then no matter how you accelerate, the speed difference between you is constant, and this difference is the speed of light. This statement seems difficult to understand, but experiments in the early 20th century proved that this conclusion is correct and the speed of light is indeed constant.

He inferred through an interesting thinking experiment that it was not light that changed, but time itself. Because the speed of light is constant, the concepts of space and time must be changed. After excluding the distance factor, all that remains is time. This means that time itself is no longer absolute, but relative, which is a major breakthrough made by Einstein. This is a very counterintuitive view, but it turns out to be correct.

The mass-energy equation E = MC 2 is actually energy = mass * the square of the speed of light. Because the square of the speed of light is a very large number, even a small object, such as a paper clip, is equivalent to huge energy, which is exactly equivalent to 1.8 tons of TNT explosive or an atomic bomb. This is a far-reaching equation, which took people several years to master. In this equation, Einstein showed that energy and mass are related. Imagine you are sitting in a spaceship, trying to catch up with the speed of light. Rocket fuel burns violently as always, but when you approach the speed of light, you will find that the speed decreases, but before reaching the speed of light, rocket fuel will continue to burn and generate energy, and this energy must have a place to go. If you haven't reached the speed of light, it means that you are getting harder and harder to move forward, that is, you are getting heavier and heavier, so your mass is increasing. So Einstein realized that mass itself is a form of energy. This is the essence of the mass-energy equation.

At the same time, he told us there was more. It tells us that a small amount of matter can be converted into great energy. No matter what substance, apple jam, stone or monkey's earwax, it is theoretically an atom that can be converted into energy. The question is what kind of energy needs considerable energy to be released. One way is nuclear fission. If a large nucleus, such as uranium, is split in two, part of it will be converted into energy, and there will be a terrible radiation by-product. Another method is nuclear fusion, which allows two hydrogen nuclei to polymerize to form a helium nucleus and generate some energy, but first you need a high temperature environment of about 1 100 million degrees Celsius, which is why stars such as the sun can carry out nuclear fusion. If we can solve this problem on earth, controlled nuclear fusion will bring us endless clean energy. A nuclear fusion power station consumes about 1 kg of fuel every day, which is equivalent to a big bag of sugar, while a coal-fired power station consumes hundreds of trucks of coal every day. Now you should understand how much energy we can get from nuclear fusion. This idea is really optimistic, because the hydrogen bomb is the only energy-efficient nuclear fusion we have achieved at present, and it is absolutely uncontrollable, but science is still making progress.

Einstein knew that his first theory of relativity missed something: gravity, so he renamed it special relativity and began to deal with a brand-new version, which he called general relativity. Legend has it that Einstein sat in his office and saw a man repairing the roof. He imagined that the poor guy fell down, and this idea gave him what he called "the happiest idea of his life." The man was actually in weightlessness when he fell. If you put him in a closed box that is also falling freely, he won't know that he is moving, and this situation will last until the moment he lands. Einstein realized that gravity was actually just an illusion, although its influence was as real as ever. Einstein spent ten years studying the details, and finally he drew a brand-new picture composed of time, space and gravity. In this new universe, gravity slows down time. He combined three-dimensional space with time and put forward the concept of time and space. This is an incomprehensible concept, because we live in a three-dimensional space and we can't describe a four-dimensional space. There is another direction besides up, down, left, right and left, which I can't point to, unfortunately, because I can only point out the direction in space, but if we can point out this direction, it is the direction of time.

We can think of time and space as a rubber sheet. If gravity is considered, it will make this rubber block sink. If I put a planet into my space-time, it will deform space-time, and that is my gravity well. So we don't just regard it as a force, but as a disturbance of time and space. We say that gravity makes them move around larger objects, but if gravity doesn't exist, then there must be some other factors that make objects move in a straight line. When their paths are curved, indeed, surfaces can achieve this. So if you want to fly directly from Beijing to new york in the shortest distance, you can choose to fly straight ahead, but if you look at that straight line from space, you will find that it is actually an arc, because you will fly around the surface of the earth. Einstein found that curvature and gravity are essentially the same, so we have this curved four-dimensional space-time, which is actually equivalent to gravity. The farther away from the center of the earth, the weaker the gravity. As far as the aging speed is concerned, your head is one hundredth of a second faster than your feet every day. By your 80th birthday, your skull is 300 nanoseconds older than your toes, which is one millionth of the blink of an eye.

General relativity really got rid of the inherent way of thinking. Einstein used the method of thought experiment to imagine the scene, but no one had thought of it before. Einstein's way of thinking and the way of integrating knowledge are unique.

Einstein's view is correct. An astronomical experiment proved that gravity can bend light, subverting all our previous cognition of space, time and universe, and Einstein became a world celebrity. General relativity has caused a great sensation in the world, which is very rare for scientific theory. I think the general theory of relativity touches the world we can perceive, deepens our understanding and cognition of the universe, and the Newtonian school's worldview is completely shattered. Since human beings can think, we have been looking up at the stars and wondering where there is something. Einstein has provided us with a wider window.

At this point, the general theory of relativity has come to an end, and many things have happened on this basis: for example, the exploration of quantum physics, BIGBANG's theory, rejecting Israel's invitation to make him president, and later Einstein encouraged American President Roosevelt to order the development of an atomic bomb. This is an extremely difficult decision, because Einstein was a pacifist and struggled for peace all his life.

Einstein left this four-dimensional world in 1955, and an autopsy stole his brain. He wants to find out whether there is a physiological connection between the brain and genius, and he wants to reveal the secret of Einstein's talent. Finally, it is found that Einstein's brain is as big as that of ordinary people, which leads to the argument that the bigger the brain, the smarter the person is. It was found that Einstein's parietal lobe was wider than normal people 15% because the lateral fissure of the brain was not fully developed. This area of the brain controls mathematical operations and spatial cognition, which are definitely two subjects that Einstein is best at. Besides, Einstein's 76-year-old gray matter doesn't seem to show any signs of aging, so maybe the key to Einstein's talent lies in his young brain, or young brain.

I think the fact is that he has been working, with childlike concentration and curiosity, and he has his own philosophy of life, which helps him develop his own ideas. Albert Einstein was a great genius, who brought us a new world view. He is the greatest physicist in history. He laid the foundation for 2 1 century science. He introduced new concepts and put forward new ideas that no one had considered before. He changed our understanding of the universe. This achievement is of great significance.