Subject:
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Re: Relativity Question
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Wed, 8 Nov 2000 21:20:41 GMT
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Reply-To:
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MATTDM@MATTDM.ORGspamcake
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Viewed:
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609 times
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Dave Schuler <orrex@excite.com> wrote:
> Not quite sure what you mean by "inertial" and "noninertial," since as you
> point out previously *everyone* is moving. However, within a local inertial
Yeah, that's what I don't get, as well. The terms "inertial" and
"noninertial" come from the britannica article, and they mean
"non-accelerating motion" and "accelerating motion". But I'm not sure how to
tell which is which without an absolute frame of reference.
> Having said that, I anticipate a followup question will be "but who's to
> say the whole inertial frame isn't accelerating away from the ship, and then
> what happens to time dilation?" Hmm...
Or: what's the difference between a ship accelerating away from the earth,
and the earth accelerating away from the ship? Just because one happens to
have the motor....
--
Matthew Miller ---> mattdm@mattdm.org
Quotes 'R' Us ---> http://quotes-r-us.org/
Boston University Linux ---> http://linux.bu.edu/
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Message has 1 Reply:
 | | Re: Relativity Question
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| (...) acceleration _is_ absolute - you can measure it, you can tell when your speed is constant. you _cannot_ tell what that speed really is though. not without a point of reference. (...) if the earth started accelerating, everyone and everything (...) (24 years ago, 8-Nov-00, to lugnet.off-topic.geek)
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Message is in Reply To:
| | Re: Relativity Question
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| (...) Not quite sure what you mean by "inertial" and "noninertial," since as you point out previously *everyone* is moving. However, within a local inertial frame the Doppler shift of light can be identified to be of a particular character (I don't (...) (24 years ago, 8-Nov-00, to lugnet.off-topic.geek)
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