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In lugnet.off-topic.geek, Dan Boger writes:
> On Tue, Nov 07, 2000 at 08:25:06PM +0000, Jude Beaudin wrote:
> > If a ship travels for 5 light years at .5c, for whom will the trip take 10
> > years? The occupants or an observer outside the ship?
>
> heh. depending who you ask. for the dude in the ship, the _world_ is moving
> at .5c, and so the world is aging slower. (btw, it's not a 1/x ratio,
> I think it's closer to a 1/x^2, but highschool was a long time ago...).
> For the people on earth, the ship is moving at .5c, and therefore the
> people on the ship will age slower.
>
> I think. IANAP :P
Let me rephrase the question:
If a man travels on a ship away from earth for 5 light years at .5c, then
returns to earth at .5c, who will have aged 20 years, the occupant or his twin
who stayed on earth?
Jude
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Message has 4 Replies:
 | | Re: Relativity Question
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| (...) laf. That's the paradox. I think we won't know until we try it. I've seen physicists get cross eyed thinking about it. Some say that _no_ time will pass at all! But again, this is what I remember from highschool, and my memory isn't that good (...) (24 years ago, 7-Nov-00, to lugnet.off-topic.geek, lugnet.space)
| | | Re: Relativity Question
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| (...) I think the answer is that we'll all grow old faster by stressing ourselves out trying to solve this. :-) Don't forget that the Theory of Relativity is just that, a theory. Also, it's based on the assumed constant of the speed of light. The (...) (24 years ago, 7-Nov-00, to lugnet.off-topic.geek, lugnet.space)
| | | Re: Relativity Question
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| Jude Beaudin <shiningblade@home.com> wrote in message news:G3o9HE.KBB@lugnet.com... (...) 10 (...) moving (...) twin (...) The twin on Earth will be (much) older than the twin who boarded the spacecraft. Assuming the twin on Earth and the twin (...) (24 years ago, 7-Nov-00, to lugnet.off-topic.geek, lugnet.space)
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Message is in Reply To:
| | Re: Relativity Question
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| (...) heh. depending who you ask. for the dude in the ship, the _world_ is moving at .5c, and so the world is aging slower. (btw, it's not a 1/x ratio, I think it's closer to a 1/x^2, but highschool was a long time ago...). For the people on earth, (...) (24 years ago, 7-Nov-00, to lugnet.off-topic.geek, lugnet.space)
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