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Thread: Einsteins theory about traveling faster than light

  1. #1 Einsteins theory about traveling faster than light 
    Forum Ph.D. verzen's Avatar
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    Einstein once said that if you travel faster than light, you can go back in time.. However I was thinking about it and Einstein did not mean that you could go back in time. What he meant is that if you brought the hubble telescope 2,000 light years away (if we could transfer their instantly) than we could use that telescope and zoom in on earth and actually see the past. The reason being is that light travels at a certain speed and the light that bounces off of us would travel through space. Theoretically we could see the past through light.... I figured that out today on my own actually, without anyone telling me about it....
    *snicker*


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  3. #2  
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    Congratulations! Essentially, what you've discovered is that at a distance of 2000 light years away, the light that was reflected/emitted from Earth is just arriving.


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  4. #3  
    Forum Ph.D. verzen's Avatar
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    Well, I knew THAT already.. I just didn't put einsteins theory and the whole light thing together until now.
    "Democracy is a problem because it treats everyone as equals." - Betty Fischer

    "back in the 50's or 60's Nicky Criuz was a gang leader who met David Wilkerson in New York City. After much discussion over months or years, i forget how long, Wilkerson's wife became pregnant. one day Cruz decides to test God, he basically prayed--God if you are real let the baby be born a boy-- it was a boy. "
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  5. #4  
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    Just yankin your chain...
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    Forum Senior Booms's Avatar
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    To quote my current favourite tv person 'Indeed'

    I agreee completely that that's probably what Einstien meant, the whole traveling 'back' in time simply by going really really fast notion has always ticked me off, purely because so many very clever people say it when it's simply illogical and blatantly wrong

    The only excuse I can come up with for this is Hawkins 'twins theory' (I actually have no idea if it's called that, or even if it's originally his, I just saw it in one of his books), that a twin can fly off at lightspeed for 20 years or so, and come back younger than his other twin. But again this comes down to simple Light illusions and bending the perception slightly, both twins have aged 20 years and both twins are now twenty years older, all that's happened is one twin is seeing light from a different time of the other




    although I'm not saying Time travel is impossible, check this out http://www.physorg.com/news63371210.html
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  7. #6  
    Moderator Moderator Janus's Avatar
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    Quote Originally Posted by Booms
    To quote my current favourite tv person 'Indeed'

    I agreee completely that that's probably what Einstien meant, the whole traveling 'back' in time simply by going really really fast notion has always ticked me off, purely because so many very clever people say it when it's simply illogical and blatantly wrong
    Its not what he meant even if he said it. But I doubt that Einstein ever actually said that. What is true is that if you allow FTL transmission of signals in Relativity, it allows for the abilty to send signals back in time. But on the hand, Relativity forbids the tranmission of information at FTL speeds.

    The only excuse I can come up with for this is Hawkins 'twins theory' (I actually have no idea if it's called that, or even if it's originally his, I just saw it in one of his books), that a twin can fly off at lightspeed for 20 years or so, and come back younger than his other twin. But again this comes down to simple Light illusions and bending the perception slightly, both twins have aged 20 years and both twins are now twenty years older, all that's happened is one twin is seeing light from a different time of the other
    This is the "Twin Paradox" and is due to Relativity. And your interpretation is all wrong, For one, the twin does not travel at Light speed (this is forbidden), but at near light speed. And two, he does age less than his stay at home brother. For example, if he traveled at 0.99c, for 20 years Earth time, he will have only aged a little less than 3 years himself.
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  8. #7  
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    Quote Originally Posted by Janus
    Quote Originally Posted by Booms
    The only excuse I can come up with for this is Hawkins 'twins theory' (I actually have no idea if it's called that, or even if it's originally his, I just saw it in one of his books), that a twin can fly off at lightspeed for 20 years or so, and come back younger than his other twin. But again this comes down to simple Light illusions and bending the perception slightly, both twins have aged 20 years and both twins are now twenty years older, all that's happened is one twin is seeing light from a different time of the other
    This is the "Twin Paradox" and is due to Relativity. And your interpretation is all wrong, For one, the twin does not travel at Light speed (this is forbidden), but at near light speed. And two, he does age less than his stay at home brother. For example, if he traveled at 0.99c, for 20 years Earth time, he will have only aged a little less than 3 years himself.
    I agree with Janus. I don't know what you mean by "but again this comes down to simple Light illusions and bending the perception slightly".
    I have always assumed that time dilation was an accepted scientific fact.
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  9. #8  
    Universal Mind John Galt's Avatar
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    Thank you Janus for returning some sanity and science to a fatuous discussion.
    Thank you Halliday for acknowledging that contribution.

    To Verzen and Booms: when I don't understand something I have found one of two approaches works well. Either keep quiet and try to work it out through thought or study, or ask someone appropriate an appropriate question. I have rarely favoured your own technique of publicly spewing nonsense. But that's just me. Don't let me spoil your party.
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    Forum Ph.D. Steve Miller's Avatar
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    Perhaps, Einstein meant, I'm pretty sure he didn't, but lets say that we are closer to 'time travel' when we ones accomplish space travel?

    Steve
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  11. #10 Re: Einsteins theory about traveling faster than light 
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    he meant what verzen said at the end of his post, that if you can travel at ftl speeds, you could effectively observe the past.
    Wise men speak because they have something to say; Fools, because they have to say something.
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  12. #11  
    Forum Ph.D. Steve Miller's Avatar
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    .... which was about the same. Or, do you think you'll watch off the stern of the vehicle and do see past times?


    If so, where does they stop? Was the stern staying in that past so that the ship warps until it disintegrates structurally?

    Steve
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