Margus Ramst wrote in message <37B0DFCB.4BB5598C@peak.edu.ee>...
>I believe Ken means light only enters the medium and is refracted if it is
not
>reflected. Light can be partially reflected or refracted, but only one of
the
>two can happen on a photon by photon basis.
Take this one up with the quantum physicists -- they will tell you that a
photon can be simultaneously reflected and refracted. :-)
Mark