"Dave" wrote in message
...

"christofire" wrote in message
...

"Cecil Moore" wrote in message
...
christofire wrote:
'Charge' ... can take effect almost instantaneously ...

It's akin to a 100 foot long tube of marbles.
Hit one end of the tube with a hammer and
measure the time it takes the energy impulse
to reach the other end of the tube. How fast
and how far did the energy impulse travel?
How fast and how far did each marble travel?
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com


Absolutely. When the old lady in the flat below bangs on her ceiling
with her walking stick, the end of the stick hits the ceiling instantly
as she pushes it upwards. Extrapolating, if an
incompressible/inextensible rod or string could be made, wouldn't that
permit communication faster than the speed of light?

I guess inextensible and incompressible are difficult to achieve, but if
either were possible would the communication still be limited to the
speed of light?

Chris


predicting the properties of something that is impossible to make is
impossible.


Agreed, but c is finite so is there a degree of compressibility or
expansibility below which faster-than-c communication would be possible? ...
or would the whole principle be scuppered by Lorentz contraction?

Chris


PS: oh dear, I hope no-one applies the Coriolis effect to turn this into
Penrose-Terrell rotation
(http://en.wikipedia.org/wiki/Penrose-Terrell_rotation)!

christofire wrote:
Agreed, but c is finite so is there a degree of compressibility or
expansibility below which faster-than-c communication would be possible? ...
or would the whole principle be scuppered by Lorentz contraction?

Years ago, quantum tunneling was reported to have passed
information at faster than the speed of light. I haven't
heard anything about that lately.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com

On Sep 8, 7:31*am, Cecil Moore wrote:
christofire wrote:
Agreed, but c is finite so is there a degree of compressibility or
expansibility below which faster-than-c communication would be possible? ...
or would the whole principle be scuppered by Lorentz contraction?

Years ago, quantum tunneling was reported to have passed
information at faster than the speed of light. I haven't
heard anything about that lately.
--
73, Cecil, IEEE, OOTC, *http://www.w5dxp.com

I think there are two main avenues of thinking on the phenomenon known
as quantum tunneling being faster than the speed of light. One is
that other dimensions are involved. Data is not traveling faster than
the speed of light, it is just taking a short cut. The other is that
the data was wrong.

Jimmie

On Tue, 8 Sep 2009 06:57:13 -0700 (PDT), JIMMIE
wrote:

I think there are two main avenues of thinking on the phenomenon known
as quantum tunneling being faster than the speed of light.

As quantum tunneling occurs millions to billions of times per second
in every antenna in the world, it would seem that faster-than-light
operation would have been observed by now (something of an oxymoron
there in this irony, isn't it?).

73's
Richard Clark, KB7QHC

Richard Clark wrote:
As quantum tunneling occurs millions to billions of times per second
in every antenna in the world, ...

"For (quantum tunneling) effects to occur there must
be a situation where a thin region of 'medium type 2'
is sandwiched between two regions of 'medium type 1'"

In an aluminum/copper antenna, what exactly makes
up the two medium 1 regions and what exactly makes
up the thin region of medium 2?
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com