[escepticos] El abuelito Einstein tenía razón

[Josep Català Medina <tecpress@...>]

Por si era necesaria otra demostración....

Saludos espaciotemporales.

Josep Català

> Fuente: The American Institute of Physics Bulletin of Physics News
> Number 484   May 11, 2000
>
> THE SPEED OF LIGHT IS INDEPENDENT of the speed of the light
> source to within one part in 10^20.  Kenneth Brecher of Boston
> University (617-353-3423,  reaches this conclusion by studying
> gamma radiation arriving from distant gamma ray bursters (GRBs).
> Consider, he says, the gamma production at the GRB: radiation will
> come to us from the near side of a presumed expanding object, and
> from the receding far side.  Because of expected explosive nature of
> the GRB engine, its near and far sides might, at least in some cases, be
> moving apart at a fair fraction of the speed of light.  Any differential in
> the speed of light arising from these two gamma-emitting locations
> would then result (after a very long extragalactic journey) in a
> stretched-out gamma pulse upon arriving at Earth. In addition, the
> emitted gamma rays would scatter off of energetic thermal electrons on
> leaving the burst sources, further broadening the pulses. From the
> observed sharpness of the arriving pulses, one can deduce the
> independence of c from the source speed to be less than a part in
> 10^20, an improvement by a factor of 100 billion, says Brecher, over
> previous tests of this tenet of relativity theory.  At last week's APS
> meeting in Long Beach, CA, Brecher argued that the speed of light is
> even more fundamental a concept than light itself since it is related to
> the intimate relation between space and time.  Therefore he urged that
> c be referred to as "Einstein's constant," in analogy to Planck's
> constant, which sets the scale of quantum measurements.