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- Newsgroups: sci.physics
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- From: dwr2560@zeus.tamu.edu (RING, DAVID WAYNE)
- Subject: Re: Some physics questions
- Message-ID: <11NOV199215302274@zeus.tamu.edu>
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- Organization: Texas A&M University, Academic Computing Services
- References: <ksiew.720770120@munagin> <1992Nov10.173420.9056@edinboro.edu>
- Date: Wed, 11 Nov 1992 21:30:00 GMT
- Lines: 17
-
- sciamanda@edinboro.edu writes...
- >> 4) Why is the speed of light constant?
- >Short answer: The invariance of c is an axiom of Einstein's special theory
- >of relativity (1905).
- >
- >Long answer: This question is really concerned with the matter of how we
- >choose (or design) standards for the measurement of space and time intervals.
- [deletia]
-
- Good answer. After some thought, I think the ultimate reason we can have
- unambiguous standards for time is that the gravitational force is weak. In
- particular, if it were impossible to make a clock whose size was small
- compared to the scale of spacetime curvature, there could not be an
- unambiguous standard.
-
- Dave Ring
- dwr2560@zeus.tamu.edu
-