$$ Sue... wrote: > > bz wrote: -=-
One can state with certainty the order if the triggering or
observation uses equal length media because the ends
of the media can be co-located. If you are holding a fire
nozzel in each hand, there is no confusion about which
hydrant was opened first if the hoses are equal length.
Spatially separating the nozzles offers no physical basis
to allow a delay through a hose different from when
co-located.
Doesn't that kind of depend on how fast you separate the nozzles, whether
or not they are separating from the 'origin' at the same velocity or not,
and whether or not the water is already starting to charge the hoses when
you start the separtion exercise??
$$ No. ONLY the orbit-like-radii (altitudes-of-nozzle) matter.
Water isn't compressable [ GET out of town ..brackets mine ] and
I'd be intrested to see which of those variables someone thinks
reduces to a gamma factor.
Squirt colored marbles into the hose if you like, then you
have a absolute accounting that is as dependable as an abacus.
Have you ever wondered why the train gedanken is always
dragged out of the closest to justify 'relativity of simultaniety'
instead of something more scientific?
It is, of course, bad science to allow the motion of the train to
move an observer to a position, invalid for what he is supposed
to observe. ;-)
There is nothing in the exercise necessary for time dependent
Maxwell's equations. They are sufficient to formally resolve the
two postulates without all the confusion of an ill conceived
and misleading thought experiment.
http://farside.ph.utexas.edu/teaching/em/lectures/node41.html
Sue... > > > -- bz > >
please pardon my infinite ignorance,
the set-of-things-I-do-not-know is an infinite set.
$$ [YOU, too. Either way ..OFF on a tangent, is UP ( OUT ).]
$$
$$ p.s. Water and garden-hose are BOTH somewhat COMPRESSiBLE.
$$ [What SiMULTANEiTY, for SYNCRONOUS-like TiME-line-POiNTs?]
$$ [i.e. NO two *ADjACENT* TiME-line-POiNTs can BE, at ONCE.]
bz+nanae@ch100-5.chem.lsu.edu
Re: they are wronglyl teaching relativity of simultaneity at university.
.
