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Portal Discussion: Human at Speed of Light

  1. Jan 27, 2008 #1
    Hi all,

    I am very new to this forum so please let me know if I have posted this in the wrong place, and thanks in advance for any replies :)

    My friends and I were playing a game called Portal in which you can place two portals (each of which leads to the other). We were discussing what you could do if you placed one portal right above the other (ie, one in the ceiling and one in the floor) and then began to fall through. From there, the conversation led to what would happen to a person falling through the portals in a vaccuum (therefore ignoring air friction).

    What would happen to a person as they approached light speed at the acceleration of gravity? Assume for the sake of the question that this person does not need to eat/breathe/sleep/etc, and that the portals are matterless and do not produce any sort of friction.

    Thanks again!
  2. jcsd
  3. Jan 27, 2008 #2


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    Nice game requiring some physical thinking.
    You would have an perpetuum mobile, which is ruled out by most physical theories. But if you want an idea, how the world would look like to you while moving close to c:
  4. Jan 27, 2008 #3


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    Apparently it is theoretically possible to do something like this with a pair of wormholes, but energy conservation is preserved by changes in the mass of the two wormhole mouths; see pervect's post #6 on this thread. He says:
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