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From: Fernando Cacciola (fcacciola_at_[hidden])
Date: 2001-08-30 11:22:37

----- Original Message -----
From: George A. Heintzelman <georgeh_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Thursday, August 30, 2001 12:52 PM
Subject: Re: [boost] quantity libraries

> > > From: Anatoli Tubman <anatoli_at_[hidden]>
> > >
> > >Oh come on. The question is not what is more fundamental, but what is
> > >more useful. Which makes it much trickier, because usefulness is
> > >relative. Meter is also a derived unit. This does not make it
> > >any less useful.
> >
> > The metre is a base unit not a derived unit.
> Actually I believe the meter is now defined in terms of a number of
> wavelengths of a particular frequency of light, and the second in terms
> of the speed of light (or maybe it's the second that is defined in
> terms of a number of vibrations and the meter in terms of the speed of
> light, I forget);

The fact that metre and second are defined in terms of light properties
dosen't mean they are not base units.
They are base units all the same.

Fernando Cacciola
Sierra s.r.l.

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