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2123493 2010 年 07 月 11 日 09:10 Reading (loading. ..) Comments (0) Category: Personal Diary
famous British astrophysicist, cosmologist Stephen - Stephen Hawking recently in the British \The following is the full article:
Hello everybody, I'm Stephen Hawking, a physicist, the universe scholars and visionaries. Although I could not move, you must speak through the computer, but my thought is free. I am free to explore the universe, and think about many problems, such as: time travel possible? Back to the past or we can find the entrance to the future it? Use of natural law that human beings can become the master of time it?
time travel was considered to be science fiction, I used to avoid talking about this issue, fear of being labeled eccentric label. But recently, I'm not careful. In fact, I very much hope that the construction of Stonehenge to visit the human race. My time is very confused. If you have time machine, I must visit Marilyn - Marilyn Monroe, or to see Galileo and his telescope. Maybe I can go to the end of the universe, looking for the end of the universe.
these fantasies are possible, physicists need to focus on so-called \We know that every object, including my ride wheelchair, has length, width and height of three-dimensional space, but in fact there is another length that \Humans can survive 80 years, and prehistoric giant Shizhu Yi Li for thousands of years, the solar system is there for billions of years. Even in space, things also have the length of time, in time to roam, which means across the four-dimensional space.
Let me illustrate, drive line, etc. So in the first degree of the road space in the road, and turn left or right is equal with the second space, As up and down winding mountain road, is equivalent to the third degree space, and through a time tunnel is to enter the four-dimensional space, scientists have put this time tunnel called \In fact, the wormhole to exist around us, but too small to the ########## eye is difficult to see, they are hidden in space and time cracks.
theory, a wormhole is a tunnel or shortcut, Einstein in his \Negative energy space and time inhalation of tunnel, and then from another universe appears. But these are still the assumption, apparently no one had seen a wormhole, but theory has been employing the use of this film, such as \
things in the world is not flat or solid forms. If you are close enough to observe, you will find all the holes or wrinkles appear on the object, which is that the basic laws of physics, but also for time. As in the first three dimensions, as in the four-dimensional space, time, there are subtle cracks, wrinkles and gaps, and the ratio of molecules, atoms were also a small space called \The scientists are attempting to tunnel through space and time, or shortcuts, are constantly formed in the quantum world, disappear, or reorganization, they are actually links to two different space and time.
Unfortunately, these real tunnel diameter of only a million billionth of a centimeter, one small to humans can not cross, but that is \Some scientists believe that one day, humans may be able to catch a wormhole, and then magnify it so that even human spacecraft to pass through; if given enough power with advanced technology, scientists might also build in a huge space wormhole. One end of this wormhole near Earth, and the other end may be in the most distant planet.
theory, the time tunnel, or wormhole to travel to other planets with humans. If the wormhole ends in the same location, and the interval of time rather than distance, so the spacecraft can fly into and re-emerging in the near Earth, but returned to the \
But now, I realize that thinking is not easy in the four-dimensional space, wormhole perhaps in your mind, but puzzled. I had envisioned a simple experiment revealed that the time is now or in the future of human travel is possible through the wormhole. I will be two of my favorite things combined, to see if time travel has never been to the past is possible.
Let us imagine, I was about to hold a banquet to welcome future visitors. I will give you an invitation extended by time and space, copying a lot of copies. Maybe someday, someone living in the future will find information on the invitation, the use of wormhole time machine back to my party, to prove time travel is possible, but my time visitors may arrive at any time . Years but as I just said, no one appears. I hope at least the next Miss Universe, to move the door to my party.
why this experiment did not succeed? One reason may be time travel to the past, we called the \Among them, the most famous is the grandfather paradox (assuming you go back before the birth in his father kill his own grandparents; because your grandparents died, there will not be your father, you will not be born; you do not birth, no one will kill your grandparents; if no one is killed by your grandparents, you will present and return to the past and kill your grandparents, so conflicts occurred.) But I have a more simple \Through the wormhole, the scientists saw a minute ago myself. But if he used the wormhole to kill himself in front of a minute, what will happen the problem? Conclusion is that, now he has followed the death. So who fired the gun it? This is a contradiction.
this time machine may violate the basic principles govern the universe, that is due to be planted before today's results. I think that things could not happen themselves, if in fact the case, nothing could stop the universe may slide into chaos. Therefore, I think there should be something paradoxical in the prevention of this paradox. In other words, there must be some reason to stop scientists back to the past to kill themselves. I believe that the wormhole itself is a problem. In my opinion, this wormhole is almost impossible to exist on the grounds that the feedback effect.
when the sound through a microphone,
pandora sale, speakers along the line when the pass arrives, you will find that, every time cycle, the outgoing voice from the speaker increases one point. If there is nothing to stop the sound, the feedback effect of the final sound system will be destroyed. The same thing occurred in the wormhole body, but instead of the sound ray. Once the wormhole expansion, the natural rays will enter the circulation after these rays become very powerful, enough to destroy the wormhole. Thus, while there is a small wormhole, but it is difficult to extend it enough, not enough to support the time machine through. This is no one can go back from the future, the real reason.
seems that any other means through the wormhole, or time travel back to the past almost impossible, or paradox occurs. Therefore, time travel to the past had never happened. But this is not the end of the story, this does not mean that all time travel is impossible. I believe that time travel, I believe that access to the future. Time flows like a river, it seems that each of us are moving forward with the flow of time involuntarily. However, the flow of time in different spaces have different speeds, which is the key to the future time travel. Einstein was aware that time is where there should be slow. He is right, the satellite above the Earth's orbit, its time to flow faster than the Earth. On each spacecraft has a precise clock, but they are nearly three a day on the planet than a nanosecond.
problem is not out on the clock, but because the great mass of the Earth. Einstein believed that heavier objects, time becomes slower, the theory of time travel in the future to open a door. Center of the galaxy, 26,000 light years away from us, staying with the most important objects in the galaxy, the sun is equivalent to four million, where the slowest time passes, making it a natural time machine. Spacecraft can take advantage of this phenomenon. Control task on earth space agency observed that the spacecraft orbiting the orbital time-16 minutes. But the board will find that half of their time to slow down. 16 minutes in orbit, they feel it only took 8 minutes. In fact, this time they were already doing time travel. Imagine, they fly around a black hole for five years, ten years after the rest already. But when they got home and found the young than the old man on the planet. Therefore, if the spacecraft to a huge celestial bodies near this quality, time will slow down. But this black hole time machine too dangerous, we need to take too long to get to the future.
Fortunately we have another way of time travel. As long as your speed approaching the speed limit out of the universe, that is beyond the speed of light (300,000 kilometers per second), you can be inhaled from a black hole, into the future. The fastest in human history is the Apollo manned spacecraft on the 10th, it speeds up to 40,000 km. But to be time travel, the speed must be 2000 times faster.
Let us
Imagine that, if the Earth is surrounded by a high-speed train running on rails. Once the train close to the speed of light, it will become a time machine, passengers on the train ride is one-way ticket to the future. First, the train began to accelerate faster and faster, and finally running fast around the earth. Close to the speed of light means that the second train to fly around the earth to turn 7 laps, but no matter how much added power, the train will never reach the speed of light, because the laws of physics limit it. Let us imagine the scene of the train close to the speed of light. Compared to other world, the time the train began to slow down, as in the black hole. Who spent seven days on board, who spent the equivalent of 100 Earth years.
course, the speed of establishment of such a train to impossible, but we can build similar to the train, the world's largest particle accelerator. When the power open type, the particle velocity can reach 10 million kilometers per second. Increase the power, the particles become faster, the speed of light until the last to close. But the train is similar to particles can never reach the speed of light, the speed of light can only reach 99.99%. But this time, time travel has begun. Therefore, time travel has become very simple, as long as we reach can be achieved fast enough.
this, we need a huge spaceship, filled with a large number of top fuel, to support its accelerated to the speed of light. Full-load operation in the entire six years after the speed limit out of the universe, the spacecraft can be reached within a week with the outer planets, the speed of light after two years to reach the outer solar system a half, four years later 90% of the speed of light from Earth 48 trillion km and to achieve time travel, the spacecraft over the Earth every hour is equivalent to two hours. In two years, the spacecraft will reach 99% of the speed of light, then a day on board equivalent to the time of the year, the Earth, the spacecraft really into the future.
slow down is another good time, that human beings can make use of limited life, to travel very far to travel as long as the edge of the galaxy about 80 years. Finally, we may be through the understanding of physics, a four-dimensional space, real space by Voyager.
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