Originally posted by Helghast1
great article. but the question i have is, will we ever use "time travel" as a means of traveling to other states/countries, almost like a teleport type means?
Originally posted by Angelsoftheapocalypse
reply to post by tauristercus
I believe that nature does not prohibit backwards time travel (if time travel is possible at all) it only has to be perfect to be a true travel back in time. if not, you run the risk of going into different tangents of the "past" just as if you were to travel into the future, and have different tangents...
Originally posted by gimme_some_truth
Anyway, You have me wondering now, if you already knew the answer to why time appears to stop during traumatic events, were you perhaps getting at something else that I did not catch?
[edit on 8-8-2009 by gimme_some_truth]
The spontaneous decay of a selected atom is completely RANDOM, completely UNPREDICTABLE and completely governed by QUANTUM MECHANICAL PROCESSES.
And yet here you are able to state categorically and exactly which atom will decay next. In other words, every quantum mechanical event that happened in the entire universe would have just had to unfold EXACTLY as it did before for that one atom to decay ... the very atom that you knew would decay.
So travelling back in time and watching an event unfold exactly the way it did years ago means that even quantum events are predictable to the utmost degree ... and even worse ... are reproducible each time you travel back to the same point in time and watch the same event unfold.
Therefore, no matter how you "juggle" things around or imagine "what if's" ... there is simply no way around the 2 examples I just supplied that would permit time travel to be even
remotely possible using a single time line. But then it just gets even worse if you allow the existance of additional time lines.
distortions in space-time Einstein translated this principle into mathematical terms in his general theory of relativity. In this theory, matter and energy distort (change the shape of) space-time, and the distortion is experienced as gravity. A more common -- but less precise -- way of explaining the distortion is "Mass curves space." Einstein suggested that astronomers could make certain observations to test the general theory of relativity. The most dramatic of these would be a bending of light rays by the sun's gravitation. In relativity, mass and energy are equivalent; and, because light carries energy, it also is affected by gravity. The light-bending effect is small, but Einstein calculated that it could be observed during a solar eclipse. In 1919, the British astronomer Arthur S. Eddington observed it, thereby making Einstein world-famous. Gravitational waves General relativity indicates that gravitational waves transmit gravitational force, just as electromagnetic waves transmit electric and magnetic forces. Scientists have observed gravitational waves indirectly in a pair of neutron stars that orbit each other. Neutron stars are the smallest and densest stars known. A neutron star measures only about 12 miles (20 kilometers) across, but has more mass then the sun. By observing the pair of stars for several years, the scientists determined that the stars' orbit is becoming smaller. Calculations involving equations of general relativity show that the orbit is shrinking because the stars are emitting gravitational waves. Most gravitational waves produce such small distortions of space-time that they are impossible to detect directly. However, collisions between neutron stars and even more compact objects called black holes create tremendous distortions. Physicists are building observatories to detect the resulting waves directly. An observatory known as the Laser Interferometer Gravitational-Wave Observatory (LIGO) has three facilities -- two in Hanford, Washington, and one in Livingston, Louisiana. Each facility is designed to detect gravitational waves by sensing their effect on two metal tubes that are 2 1/2 miles (4 kilometers) long. The tubes are built along the ground, and they are connected to each other in the shape of an L. When a gravitational wave passes through them, it changes their lengths by an amount much smaller than an atomic nucleus. A laser system detects changes in the lengths. Contributor: Michael Dine, Ph.D., Professor of Physics, University of California, Santa Cruz. How to cite this article: To cite this article, World Book recommends the following format: Dine, Michael. "Relativity." World Book Online Reference Center. 2004. World Book, Inc. www.worldbookonline.com...
Originally posted by jkrog08
reply to post by tauristercus
The spontaneous decay of a selected atom is completely RANDOM, completely UNPREDICTABLE and completely governed by QUANTUM MECHANICAL PROCESSES.
But remember that wave function allows a certain probability to be known, so it is not completely unpredictable. Also once the wave function collapses it is no longer completely unpredictable, as the probability distribution becomes 100% at that point.
And yet here you are able to state categorically and exactly which atom will decay next. In other words, every quantum mechanical event that happened in the entire universe would have just had to unfold EXACTLY as it did before for that one atom to decay ... the very atom that you knew would decay.
But if you are travelling back on the same time line why would the point of wave collapse be different? Keep in mind that according to uantum theory every possible outcome does happen, just on different realities.
So travelling back in time and watching an event unfold exactly the way it did years ago means that even quantum events are predictable to the utmost degree ... and even worse ... are reproducible each time you travel back to the same point in time and watch the same event unfold.
See above post
Therefore, no matter how you "juggle" things around or imagine "what if's" ... there is simply no way around the 2 examples I just supplied that would permit time travel to be even
remotely possible using a single time line. But then it just gets even worse if you allow the existance of additional time lines.
Not really, quantum theory predicts an infinite number of universes (timelines) where each possible individual out come of every event happens. Each timeline is completely separate from the other, so in a sense reality is both singular (to each realities respected observer) and infinite (in respect to a world view). It works out fine.
Originally posted by Angelsoftheapocalypse
reply to post by Helghast1
you never know.. we could, u just havent met her or him yet...