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- Newsgroups: alt.cesium
- Path: sparky!uunet!snorkelwacker.mit.edu!bloom-picayune.mit.edu!athena.mit.edu!krpeters
- From: krpeters@athena.mit.edu (Karl R Peters)
- Subject: Re: Time and our heroic element
- Message-ID: <1992Sep10.125343.12926@athena.mit.edu>
- Sender: news@athena.mit.edu (News system)
- Nntp-Posting-Host: m37-318-2.mit.edu
- Organization: Massachusetts Institute of Technology
- References: <18mi2eINN8e3@agate.berkeley.edu> <mDr-L=+@engin.umich.edu>
- Date: Thu, 10 Sep 1992 12:53:43 GMT
- Lines: 24
-
- In article <mDr-L=+@engin.umich.edu> positron@engin.umich.edu (Jonathan Scott Haas) writes:
- >In article <18mi2eINN8e3@agate.berkeley.edu> gezelter@sam.cchem.berkeley.edu (Dan Gezelter) writes:
- >>According to the National Institute of Standards and Technology
- >>(formerly NBS):
- >>
- >> The second is defined as the duration of 9,192,631,770 periods of
- >>the radiation corresponding to the transition between the two
- >>hyperfine levels of the ground state of cesium 133.
- >>
- >
- >You sure about this? I'm almost certain that a second is defined as the
- >amount of time it takes light to travel 299,xxx,xxx meters in a vacuum.
- >
- >--
- >__/\__ Jonathan S. Haas | Jake liked his women the way he liked
- >\ / University of Michigan | his kiwi fruit: sweet yet tart, firm-
- >/_ _\ positron@engin.umich.edu | fleshed yet yielding to the touch, and
- > \/ | covered with short brown fuzzy hair.
-
- No, actually the meter is defined by the distance travelled by light in
- 1/299,xxx,xxx of a second.
-
- The second is defined by the atomic clock.
-
-