🚀 go-pugleaf

"bill" <cosmosco@optusnet.com.au> wrote in message 
news:4a6a26d1-6a3b-45d8-90e1-7f1b2b6baeed@h27g2000yqm.googlegroups.com...
On Apr 18, 4:00 pm, Pentcho Valev <pva...@yahoo.com> wrote:
> On the one hand, the constancy of the speed of light is gloriously
> confirmed by the Michelson-Morley experiment and is so "woven into the
> very fabric of physics" that "to "vary" the speed of light is not even
> a swear word: it is simply not present in the vocabulary of physics".

In 'Relativity' Einstein wrote -

"A curvature of rays of light can only take place when the velocity of
propagation of light varies with position."

Whilst the 'Crown' (English translation) publication uses the word
'velocity' ilo 'speed' there is no distinction in the German language
between those two words however assuming that Einstein was fully aware
of the fact that the velocity (i.e. the direction of travel aspect) of
a beam of light can very easily be made to change (vary) using a
mirror I am of the opinion that he was referring to the 'speed' aspect
of light.
===================================================
Opinions are like arseholes, everybody has one and they all stink.
That silly booklet came years after his 1905 paper
   http://www.fourmilab.ch/etexts/einstein/specrel/www/
 and in
  http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img53.gif
this is clearly referring to the vector nature of velocity.

Later, he says
"� 4. Physical Meaning of the Equations Obtained in Respect to Moving Rigid 
Bodies and Moving Clocks

If at the points A and B of K there are stationary clocks which, viewed in 
the stationary system, are synchronous; and if the clock at A is moved with 
the velocity v along the line AB to B, then on its arrival at B the two 
clocks no longer synchronize... It is at once apparent that this result 
still holds good if the clock moves from A to B in any polygonal line...If 
we assume that the result proved for a polygonal line is also valid for a 
continuously curved line..."
which clearly contradicts
eta = y,
zeta = z.

So don't give us any crap about your opinion of what the self-contradictory 
bastard meant, if he didn't mean what he wrote then he shouldn't have 
written it!