[Boatanchors] SI units and the rest
WA5CAB at cs.com
WA5CAB at cs.com
Tue Nov 16 19:40:39 EST 2010
Never mind. The speed of light in a vacuum is only approximately 1*10^8.
Meaning that the meter is not actually the length that it should have
originally been defined as. Another nail...
In a message dated 11/16/2010 6:25:05 PM Central Standard Time,
jfor at quik.com writes:
> As Zero Mostel said: "Tradition!"
>
> really, because the earth is the circumference it is.
>
> -John
>
> ================
>
> >I'm curious as to why it isn't 1/(3*10^8).
> >
> >In a message dated 11/16/2010 11:39:45 AM Central Standard Time,
> >w7qho at aol.com writes:
> >>The original definition of a METER was based on a measured standard
> >>bar. The standard was redefined in 1983 as the distance traveled by
> >>light in a vacuum during a time interval of 1/299,792,458 of a
> >>second, The standard kilogram is a a cylindrically shaped platinum-
> >>iridium slug and is the only SI unit still defined by an artifact
> >>rather than a fundamental physical property that can be reproduced in
> >>different laboratories.
> >>
> >>Dennis D. W7QHO
> >>Glendale, CA
>
Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
More information about the Boatanchors
mailing list