MTL - Bringing the Supermarket to the Apocalypse-Chapter 520
. A pair of twins a and b, a on the earth, b by rocket to do interstellar travel, after a long time to return to Earth. Einstein asserted by the theory of relativity that the two experienced different times, and b would be younger than a at the reunion. Many people have doubts that a see b is in motion, b see a is also moving, why can't a be younger than b? Since the earth can be approximated as the inertial system, b has to undergo acceleration and deceleration, and is the variable acceleration reference frame. The real discussion is very complicated, so this Einstein has already discussed the problem clearly because many people mistake the theory of relativity as a contradiction. It would be much easier to discuss this problem with the concept of space-time maps and world lines, but with a lot of mathematical knowledge and formulas. This is just a language to describe one of the simplest situations. However, only the language can not explain the details in more detail. If you are interested, please refer to some books on relativity. Our conclusion is that b is younger than a in any reference frame.
In order to simplify the problem, only this situation is discussed. The rocket accelerates to the sub-light speed in a very short time. After a period of flight, it turns around in a very short time, flies for a while, and decels with the earth in a very short time. The purpose of this treatment is to omit the effects of acceleration and deceleration. It is well discussed in the Earth Reference System. The Rockets are always moving clocks. When they meet again, b is younger than a. In the rocket reference system, the earth is a moving clock during the constant speed process, and the time course is slower than the rocket, but the most critical part is the process of the rocket turning around. In the U-turn process, the Earth traveled far from the rear of the rocket through a half-circle in a very short time, reaching far away in front of the rocket. This is a "superluminal speed" process. It is only this kind of superluminal speed that is not contradictory to relativity. This "superluminal speed" does not convey any information, not the superluminal speed in the true sense. Without this U-turn process, the rocket and the Earth cannot meet. Because there is no uniform time for different reference systems, it is impossible to compare their ages and only compare them when they meet. After the rocket turns around, b can't directly accept the information of a, because the information transfer takes time. The actual process seen by b is that the time of the earth has suddenly increased during the U-turn process. In the view of b, a reality is younger than b, and then quickly aging when turning around. When returning, a is slower than aging. When I meet again, I am still younger than a. In other words, there is no logical contradiction in relativity.
If time travel is possible, why are we still not surrounded by time travellers from the future world? The subtext of this question is: Time travelers have not come to us, the most likely reason is that time travel has not been realized in the long time - that is, forever.
The scientists of the last days did not regard such problems as a serious theoretical martyrdom of the time machine. However, his question has caused some physicists to think, and they have found a possible answer: that is, what we know so far is possible to realize the theoretical model of time travel, and one is likely to have universality. The common feature is that it does not allow time travelers to return to the era before the time machine existed.
Now Lin Feng has solved the crisis of the world of death. The rest is to find another base that is hidden. That is to say, space distortion has been a long time ago, and the former Naiya believers used space to distort the time to the present. Destroy.
Although the time public opinion Lin Feng has already seen it in the science magazine in his supermarket, but still can't figure it out now, maybe this is a bottleneck point of time energy. When Lin Feng communicates with the time and correctness of time, his time ability There will be a big improvement.
When I think about it again, Lin Feng regrets one thing. If I can get the energy of Konajee, can I get the ability to pass through space from him?
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