On 5 Apr 2007 18:15:30 -0700, "K7ITM" wrote:

HE thought c was a
constant, as I would if the author didn't tell me otherwise.

Hi Tom,

The speed of light is always constant - within its frame of reference.
It is only for those that inhabit a different frame that it "appears"
to be different. By Lorentzian laws, there is no time at the speed of
light and everything is simultaneous - source and load are
inseparable.

To illustrate at a slightly slower speed (from Feynman):
"A very interesting example of the slowing of time with motion
is furnished mu-mesons (muons), which are particles that
disintegrate spontaneously after an average lifetime of 2.2 µS.
They come to earth in cosmic rays.... It is clear that in its
short lifetime a muon cannot travel, even at the speed of light,
much more than 600 meters. But although the muons are created at
the top of the atmosphere, some 10 kilometers up, yet they are
actually found in a laboratory down here, in cosmic rays. How can
that be? The answer is that .... While from OUR own point of view
they live considerably longer ... time is increased ... by
1/SQRT(1-(u²/v²))."

73's
Richard Clark, KB7QHC