Rui Dong EHGL106 A.
Halliday 11/4/2013
Wormholes and time travelling
Wormholes, the most imaginary and amazing connection in our multi- universe, is the most suitable way for the human beings to travel through the time. Although the concept of the wormholes is only based on the theory, more and more evidence substantiates the existence of the wormholesthe Einstein-Rosen bridge. This route way connects the our parallel universe that diminish a very long distance like millions of parsec into a instantaneous dimension. The technology for time travelling is not yet refined, but the development and the necessity of human evolve promotes the time travel becomes a real way to discover the unknown world and structure of the universe. The author introduces the time travelling first, and uses many citations as a persuasion and attraction to the readers, H.G.Wells, a famous author who creates a lot of amazing science fiction ideas, could give an inspiration to Stephen Hawking, the time machine. In the past science fiction field, the submarine, landing on the moon have realized now, but how about travelling to the future? This is a attractive question. Then, the scientific analysis will be more persuasive to determine whether the idea makes sense. Kurt Godel, another famous person as an example used by Hawking will be an initiation. Godel discovered a new time and space which the general relativity accepted. Enistein and Godel devoted in the general relativity and predicted that the time travel can either happen due to the rotation inside the black
hole, or the existence of cosmic string, which, has a colossal tension that accelerates the planets in a short time. Cosmos constant is actually 0 after the Haber discovering the inflation of the universe. So Einstein realized there should be reason. The cosmos string does not have a curvature allows the time travelling due to the microwave background and light element abundance, but can we distort the part of the space that allows the curvature to exist?
The time travelling is the idea that most science fiction authors will care about, but the theory would give a clear direction about time travelling. Hawking gives us an example, to travel to the Centaur Galaxy, which is about 4 light years away from the earth, a observer watched an Olympic game on the earth and then convey the information to the council in the Centaur Star, which corritor takes place the first. From the observer, if he travels below the light speed, the people on Earth will know that the game takes place the first, but if the observer travels over the light speed, the council on the Centaur will realize that the council conference takes place the first. This substantiates that for the same observer, physical theory obeys whatever how fast he can reach, but for different observer, the situation is more complicated.
For the experiment, Hawing uses the particle accelerator as an example, people can accelerate the particles to 99% of the light speed, but never reaches the light speed because of the high power, the closer to the light speed, the more energy will need, and scientists are unable to activate any of the particles to the light speed
It seems the time travelling is impossible, but wait, how about the concepts of worm holes? The example of Einstein-Rosen bridge, the academic name of the wormholes, which connects two terminals of a bend universe, people need substance with negative density and energy to obtain a negative curvature to allow the worm holes become stable, otherwise the spaceship can hit the singularity when the worm holes contract. From the distortion of light when the solar eclipse happens we know the time and space can be distorted, and from the Casimir effects we know the time and space can be distorted that allows people to engage in time travelling. Existence of virtual particles can create a negative curvature. The classical theory may not allow the paradox of time travelling, but the quantum theory is totally different, micro-physics is all about the uncertainty principle, and will be more complicated and need lot of time and devotion to realize the time travelling. In conclusion, Hawking uses the citations both in science fiction and famous scientists to create a vivid discourse, the rhetorical situation is all about the discovery, which shows people will finally find the result with development both in technology and mind in the future
