[gomaaa]

You're talking about motion INSIDE a dielectric material? The speed of light in any material is slower than the actual speed of light in a vacuum. This has little to do with the speed of light in general and is more of an electromagnetic property of the material. It is possible for objects like electrons to move faster than this speed of light, just as it's possible for airplanes to fly faster than the speed of sound. They even give off radiation in a shock wave just like a sonic boom. It's called Cherenkov radiation.

Still, it sounds like VERY interesting work. Got a link? I guess I could do a Google search, but I'm just too lazy at the moment.

[RightWhale]

I don't have a link, but it is in the current issue of Physics World. [Yes, there is such a publication, and it's target audience is the general public. Lotsa pictures, not much math.]

Article is titled "Futuristic device defies law." Pg 6.