> > > Or is all of the above irrelevant because the "refractive index" has nothing to do with the
> > > speed of light?
> >
> > Refractive index is the ratio between the densities of the two media, and thus relates to
> > the proportion by which the light changes speed when passing between them.
>
> What about when one of them is a brick?

Have you ever seen a transparent brick? If so, please shed some light on the subject!

As for me, I'm just doing my best trying to remember not to throw those darn things straight up...

-John W.