: : yanniru: : : My reference is Born & Wolf, Principles of Optics. In there you will find that when light propagates in materials, its group velocity slows down. Ther are so-called precursors that propagate through the materials at the speed of light, but precursors can carry no information. : : Greg: : : When you are done patting yourself on the back, try reading what you wrote, then explain what speed you are talking about when you say the precursors propagate through the materials at the speed of light. Is this some different speed of light?

: Unfortunately this will be my last contribution to this site. I am afraid it just does not measure up to what a forum on Astronomy should be. I hope the other contributors to this site will stay here and stay away from the more professional sites.

Lee: I'm beginning to come to the same conclusion myself friend. And I haven't been here that long. The agenda is getting skewed by the "Young Earth Creationists" who seem to come crawling out of the woodwork anytime the word God comes up. It must be especially frustrating for a genuine scientist/creationist like yourself who has not chosen to be ignorant like so many of these "fundys" have. What I'll never understand is why a belief in God the Creator causes a small few to give up all common sense and surrender their very wills to the rantings of a few maniacs who turn their backs on the reality around them in favor of some mythology that requires one to believe things that simply CANNOT be true. It's kind of like the Cult phenomena huh.

Peace and good luck in your endeavors. I'm not sure how much longer I'm going to bang my head against the wall with these "blind leading the blind" myself.