Special relativity gives the law of high-speed motion of objects, and puts forward that mass and energy are equivalent, and gives the relationship between mass and energy. These two achievements are not obvious to macroscopic objects moving at low speed, but they are extremely important in the study of microscopic particles. Because the speed of microscopic particles is generally relatively fast, and some of them are close to or even reach the speed of light, the physics of particles cannot be separated from relativity. The mass-energy relationship not only creates the necessary conditions for the establishment and development of quantum theory, but also provides the basis for the development and application of nuclear physics.
General relativity has established a perfect theory of gravity, mainly involving celestial bodies. Today, relativistic cosmology has further developed, and gravitational wave physics, compact astrophysics and black hole physics, which belong to relativistic astrophysics, have made some progress, attracting many scientists to study.
A French physicist once commented on Einstein: "Einstein will be at the forefront of physicists in our time." He is and will be one of the most outstanding superstars in the human universe. "In my opinion, he may be greater than Newton, because his contribution to science has entered the structure of the basic essence of human thought more deeply."
The mass-energy equation destroyed the materialistic view that matter is indestructible.
It is difficult to explain whether there is a time tunnel in the world. Some scientists believe that space and time are intricately intertwined. If we want to go back to the past or reach the future, we must separate time from space so that we can cross time and space. Wormholes are what we call time tunnels. As long as we can open the wormhole in space, we can go back in one direction and go to the future in the opposite direction. The way to open the wormhole is to use anti-gravity substances.
The following is quoted from the Internet:
Wormholes are special passages connecting two spacetimes or two universes, which allow substances or information to travel through the universe in an instant, even in time. This term comes from American physicist Wheeler, who is Einstein's partner in his later years, the teacher of the legendary Feynman in physics, and another popular scientific term "black hole" is also his masterpiece.
As far as space is concerned, wormholes open up the possibility of superluminal travel. As far as time is concerned, the speed of light is actually an insurmountable limit, and no matter or information can move at a faster speed. Therefore, if people can reach a place before the information arrives from the starting point, it is equivalent to completing a time trip back to the past, and vice versa.
Wormhole is also called "Ai En Stein-Rosen Bridge", and its theory involves very complex and abstract physical and mathematical theories. In short,
British physicist Davis pointed out that it takes three steps to build a wormhole time machine in theory: the first step: find or build a wormhole and open a channel to connect two different regions in the universe.
Step 2: stabilize the wormhole with the help of negative energy generated by "exotc substance" or anti-gravity substance, and let the substance and information pass safely. The function of negative energy is to counteract the trend of wormholes becoming infinite density, in other words, to prevent wormholes from evolving into black holes.
Step 3: Pull the wormhole to keep the two entrances of the wormhole separated. If the location is right, the time difference between them will remain the same. Suppose the time difference is ten years, and an astronaut crosses the wormhole from one direction, he will go back to the past ten years ago, and vice versa.
However, Xu Daohui and Bonnie, two physicists at the University of Oregon in the United States, believe that this wormhole channel supported by foreign matter and negative energy has inherent defects and violates the law of "zero energy condition", so it must be unstable.
Xu Daohui said, "We don't completely deny the possibility of building wormholes, but emphasize wormholes where time and space can be accurately predicted. For example, it is not feasible for Spock of Star Trek to appear in new york at two o'clock one afternoon. 」
Dr Faust of York University in England and Dr Roman of Central University of Connecticut in the United States demonstrated that the wormhole road was impossible from another angle. They think that even if the wormhole is built, its passage will be too subtle to use.
According to their estimation, in order to let basic particles such as protons pass through the wormhole, it is necessary to fine-tune the wormhole to the negative 30 th power of ten; As for the wormhole where human beings can roam freely, it is necessary to fine-tune the negative 60 th power of ten, which is far beyond the ability of human science and technology.
In the movie of the same name adapted from Sagan's novel Contact with the Future, the heroine played by Jodie Foster flies over the wormhole passage and reaches Vega, 26 light years away from the earth, in just a few minutes to meet her father who has passed away for many years. Only in the movie, human wormhole technology is begging for gods from aliens; At present, it seems that it is still far away to realize the dream of vertical and horizontal space and time on our own.