John Smith wrote:
... "they" do travel MUCH slower than the speed of light ...

When traveling through a medium other than a vacuum
they do travel MUCH slower than the speed of light
*in a vacuum* but they travel at exactly the speed
of light *in the medium*, i.e. the photons don't
know that they have slowed down. :-)
--
73, Cecil http://www.w5dxp.com