Re: Some Contradictory Claims in SR:

From: kenseto (kenseto_at_erinet.com)
Date: 02/10/05 

Date: Thu, 10 Feb 2005 21:16:49 GMT

"Gregory L. Hansen" <glhansen@steel.ucs.indiana.edu> wrote in message
news:cugi16$pv9$1@rainier.uits.indiana.edu...
> In article <VoOOd.1326$Cs5.174@fe2.columbus.rr.com>,
> kenseto <kenseto@erinet.com> wrote:
> >
> >"Gregory L. Hansen" <glhansen@steel.ucs.indiana.edu> wrote in message
> >news:cugatn$nan$1@rainier.uits.indiana.edu...
> >> In article <lRMOd.24678$i42.2948@fe1.columbus.rr.com>,
> >> kenseto <kenseto@erinet.com> wrote:
> >> >
> >> >"Gregory L. Hansen" <glhansen@steel.ucs.indiana.edu> wrote in message
> >> >news:cug17p$k78$1@rainier.uits.indiana.edu...
> >> >> In article <QrLOd.24664$i42.1244@fe1.columbus.rr.com>,
> >> >> kenseto <kenseto@erinet.com> wrote:
> >> >> >
> >> >> >"Gregory L. Hansen" <glhansen@steel.ucs.indiana.edu> wrote in
message
> >> >> >news:cudl3h$keg$1@rainier.uits.indiana.edu...
> >> >> >> In article
<1107972609.661893.315380@f14g2000cwb.googlegroups.com>,
> >> >> >> PD <pdraper@yahoo.com> wrote:
> >> >> >> >
> >> >> >> >kenseto wrote:
> >> >> >>
> >> >> >> >> > length of a stick flying by at 20 m/s? Be careful here. I'm
> >asking
> >> >> >> >you
> >> >> >> >> > do define length measurement.
> >> >> >> >>
> >> >> >> >> Sigh....you don't and can't *measure* the length of a moving
> >ruler.
> >> >> >> >You
> >> >> >> >> *predict* its length using IRT or LT. In the case of IRT it
> >posits
> >> >> >> [...]
> >> >> >>
> >> >> >> >If all you can do is *predict* the length of a moving ruler, but
> >you
> >> >> >> >can't measure it, then you can't test the prediction, and it
> >becomes
> >> >an
> >> >> >> >empty theory.
> >> >> >> >There MUST be a way to measure a moving ruler, to test the
theory.
> >> >What
> >> >> >> >is that way?
> >> >> >>
> >> >> >> He can't even predict it if he can't define length measurement.
> >> >Whatever
> >> >> >> he predicts, he can't say that it is length if there is no
> >definition
> >> >of
> >> >> >> length to satisfy.
> >> >> >
> >> >> >Hummm...I wonder how Einstein do physics before the light-second wa
s
> >> >> >invented to measure length.
> >> >>
> >> >> According to his 1905 paper, he used a ruler to measure length.
> >> >
> >> >Ah...so why did you say that I can't define length measurement??/
> >>
> >> I didn't say that, you did. You said the length of a moving ruler can
> >> only be predicted, not measured. If you can't define a procedure to
> >> measure the length, what in the world do you think is being predicted?
> >
> >So give me some reference where the length of a moving rod is measured
> >physically.
>
> That is not a necessary condition to defining the meaning of the length of
> a moving rod.

PD said that he can measure the length of a moving rod and I said you can't
do that then you came in and said that if you can't measure the length of a
moving rod then you don't know what is it that you are predicting. So I
asked you to give me some reference where the length of a moving rod is
measured.

>You said you can predict the length, but what is it that
> you're predicting? Whatever it is, why should it be called a length?

Why shouldn't it be call a length if it is measured by a ruler.???

Ken Seto

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