On Mar 19, 8:31 pm, "Eisboch" wrote:
"Frogwatch" wrote in message

...

To enlighten some people, "Faster than light travel" is prohibited
mathematically because it results in violation of causality, ie.,
effects happen before the cause (yes, there may be exceptions).

If I can find it, I'll send you a paper written by some Russian scientists.
It was given to me by a German friend of mine who surprised me with it
following a long debate we had over some beers.

(he held two Phd's in Physics)

Basically, it describes an experiment whereby a laser beam was fired into a
tube that contained cesium in a gaseous form, then exited the tube and hit a
target sensor. They had some exotic metrology set up to measure and record
the tests.

The photons contained in the laser burst exceeded the speed of light,
according to the test results.

Eisboch

Yeah, I read about that. The catch was the diff tween "group"
velocity and "wave velocity" (I forget which is which). What the
speed of light limitation REALLY says is that no information can be
transmitted faster than light. A simple sine wave carries no
information so that laser beam can exceed light speed but if you try
to modulate it to carry info it wont work, your signal travels at
speed of light.
I have just exhausted all my knowledge of this subject. Mostly a PhD
in physics is a license to bull**** authoritatively.