On Mar 9, 3:42*am, "Szczepan Bialek" wrote:
Faraday known that the speed of waves is the same in copper and space.

RF waves (fields/photons) cannot exist or flow IN copper. RF waves
(fields/photons) flow in the space surrounding copper. The free
electrons in a copper wire move only at a tiny fraction of the speed
of light, 0.00028 m/s in the Wikipedia example. For RF signals, the
electrons move hardly at all and can be considered to be vibrating in
place acting as a sort of bucket brigade for the photons.

http://en.wikipedia.org/wiki/Drift_velocity
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73, Cecil, w5dxp.com