Re: What was original in Einsteins SR theory ?


"Gregory L. Hansen" <glhansen@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:dhu8p9$g12$1@xxxxxxxxxxxxxxxxxxxxxxxxxxx
| In article <1128407331.040336.266700@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
| blackboab <blackboab@xxxxxxxxx> wrote:
| >the two postulates of SR
| >
| >1. That the speed of light is a constant in all reference frames was
| >actally the work of Maxwell where the quantity c appears as a
constant
| >independent of frame of reference.
| >
| >2. All inertial reference frames are similar was actually the work of
| >Galileo.
| >
| >the gamma correction was the work of Lorentz and Fitgerald
| >
| >Poincare and Fizeau also added ideas
| >
| >what EXACTLY did Einstein add ?
| >
| >what in SR is uniquely Einsteins ?
| >
|
| In earlier work, it was thought that the speed of light is constant in
the
| same way that the speed of a sound wave in air is constant-- it has a
| particular speed through the medium, but it still transforms under
boosts
| as c+v. The gamma factor of Lorentz represented a physical change in
| dimensions of objects moving relative to the aether, and it was not
| theoretically motivated but was just what term was required to remove
a
| dependence of velocity through the aether from electromagnetism while
| preserving the assumption of c+v.
|
| Related to the assumption of c'=c+v, Maxwell's equations as given in
the
| textbooks would be for the rest frame of the aether. Under a boost
they
| would pick up velocity-dependent terms. The assumption was basically
that
| Newton's mechanics were correct, and electromagnetism had to be fixed
up.

Which is simple to do:

c = 1/sqrt(epsilon * mu)

The permittivity and permeability of space is zero,
c = 1/sqrt(0*0) is undefined.

The permittivity and permeability of aether defined the speed of light
in aether.


[snip crap]

| If the Lorentz
| transformations were not universal, it could have been the case, e.g.,
| that particle decays mediated by the electromagnetic force would go as
| t'=t/sqrt(1-v^2/c^2)

Idiot:
t' = (t-vx/c^2)/sqrt(1-v^2/c^2)
= (t - v (vt)/c^2) / sqrt(1-v^2/c^2)
= t (1 - v^2/c^2) / sqrt(1-v^2/c^2)
= t * sqrt(1-v^2/c^2)

Androcles.

.

Relevant Pages

  • Re: Reality versus pure Relativity
    ... different reference frames (let us consider only the inertial ones ... Get a beer, get your eyeglasses on and have the patience ... related to the aether concept. ...
    (sci.physics.relativity)
  • Re: Wonderful!
    ... It just so happens the aether is at rest relative to ... the train in the train frame of reference and at rest relative to the ... embankment in the embankment frame of reference. ...
    (sci.physics.relativity)
  • Re: Wonderful!
    ... It just so happens the aether is at rest relative to ... the train in the train frame of reference and at rest relative to the ... embankment in the embankment frame of reference. ...
    (sci.physics.relativity)
  • Re: Gravity Probe B-failure or special new success?
    ... with a parenthetical reference to the motion of our gyroscope rotors. ... reference corresponding to zero velocity in the aether. ... corresponds to an effect of a fixed frame - the same one identified by ...
    (sci.physics)
  • Re: Wonderful!
    ... It just so happens the aether is at rest relative to ... the train in the train frame of reference and at rest relative to the ... embankment in the embankment frame of reference. ...
    (sci.physics.relativity)