🚀 go-pugleaf

On Apr 18, 6:40 pm, bill <cosmo...@optusnet.com.au> wrote:
> 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.
>
> According to 'Oxford' - propagation means the transmission of light IN
> A PARTICULAR (SPECIFIC) DIRECTION.
>
> Einstein continues -
>
> "We can only conclude that the special theory of relativity cannot
> claim an unlimited domain of validity; its results hold only so long
> as we are able to disregard the influences of gravitational fields on
> the phenomenon (e.g. of light."
>
> The concept of the constancy of light speed is one of the
> gravitational-field-location-invalidated results of special theory to
> which Einstein referred.

  Yeah, we know, "accelerated frame" etc.

  Pentcho just cannot (or *will* not) grasp the distinction. For him,
local, conditional exceptions equate to global invalidation.


  Mark L. Fergerson