Natural Science Forum / Physics / Relativity / November 2005

> "Harry" <harald.vanlintel@epfl.ch> wrote in message news:43870723$1@epflnews.epfl.ch...
> >
> > "Igor" <thoovler@excite.com> wrote in message
> > news:1132918168.696302.32040@z14g2000cwz.googlegroups.com...
> > >
> > > Pentcho Valev wrote:
> > > > Albert Einstein, "Relativity", Chapter 7: "There is hardly a simpler
> > > > law in physics than that according to which light is propagated in
> > > > empty space. Every child at school knows, or believes he knows, that
> > > > this propagation takes place in straight lines with a velocity c=300000
> > > > km/s."
> > > >
> > > > Chapter 22: "...the law of the constancy of the velocity of light in
> > > > vacuo, which constitutes one of the two fundamental assumptions in the
> > > > special theory of relativity and to which we have already frequently
> > > > referred, cannot claim any unlimited validity. A curvature of rays of
> > > > light can only take place when the velocity of propagation of light
> > > > varies with position. Now we might think that as a consequence of this,
> > > > the special theory of relativity and with it the whole theory of
> > > > relativity would be laid in the dust. BUT IN REALITY THIS IS NOT THE
> > > > CASE."
> > > >
> > > > Pentcho Valev
> > >
> > > There once was a time when I didn't understand the difference between
> > > speed and velocity either, just like you.  But I overcame my ignorance
> > > and became educated.  It can do wonders for your outlook.  It might be
> > > worth your while   Just a suggestion.
> >
> > Igor, funny enough you're mistaken, your new education is useless for
> > correctly understanding old English publications. Maybe you were too much in
> > newsgroups, and don't read enough publications, especially of that time
> > period -- also just a suggestion. Or learn German -- just another
> > suggestion. In any case, Einstein's Geschwindigkeit in the above text means
> > "speed" in the jargon of this newsgroup. And if you knew to which
> > calculation Einstein referred in the above text, you would already know
> > that.
> >
> > Harald
>
> As far as I have verified, whenever the word "Geschwindigkeit"
> appears in the original article, he is talking about the speed (or
> in a few cases the closing speed, when
> The only place where he is talking about the vector, he calls
> it "Geschwindigkeitsvektor".
>
> And besides that, your remark is entirely irrelevant and off
> the mark. You seem to have a problem reading what people
> (and that even includes yourself) write.
> Agenda?
>
> Dirk Vdm