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by HungryGuy on August 27th, 2004

HungryGuy

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Is it possible to make a time machine? If so, how?

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  • by zeropointburn on April 21st, 2005

    zeropointburn

    Possible? Almost certainly not. If it were, though, Einstein had some things to say about it...
    All paradox aside, the prime candidate is time dialation. Relativity states that as an object travels significant portions of the speed of light, it experiences a shorter amount of time than an observer at rest. As one approaches c, one's experienced time approaches 0. If one could go faster than light, mathematically one would be moving backwards in time. Good luck with that, though, since mass also increases with speed. The reason c is an absolute limit is that anything with any mass at all to start with would end up with an infinite mass, which would take infinite energy to accelerate past c.
    Of course, Einstein had his own problems with quantum theory. It's possible that, at some point, our understanding of quantum states will allow us to transport sentient beings into the past. As to who would be so recklessly irresponsible as to allow it, I suspect only some nations' governments would dare.

    Comments

    • Feynmann liked the view that a positron is just an electron travelling backwards in time. The physics is the same.

      Quirkie

      by Quirkie on April 22nd, 2005

    • i might add that time is merely a probability and each discreet moment unique only to a discreet entity. so, if that entity traveled faster than light that moment would disappear and would therefore never have happened. this event/non-event likely happens

      greatestgranddad

      by greatestgranddad on June 15th, 2006

    • yes, i forgot to add that time always travels backward and forward at the exact same speed. our imagination supplies the rest...

      greatestgranddad

      by greatestgranddad on June 15th, 2006

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