Aren't there relativistic effects on Cs standard frequency because of different gravity? (or is that really, the "same" frequency, just in a different frame of reference)
> -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of J. Forster > Sent: Tuesday, February 23, 2010 1:43 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Primary standard again > > A REAL "primary standard" is something that you can assemble the kit of > parts anywhere in the Universe, flip the switch, and get exactly the same > time interval as anywhere else. > > That obviously does NOT apply to the pendulum, as it depends on the value > of G. > > -John > > ================== > > > > I suppose a pendulum can be a primary standard at some accuracy. Using > > the "kit of parts" analogy, if one builds the pendulum and operates it at > > sea level, the period of the pendulum is entirely determined by the > > physical dimensions and the gravitational constant. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
