[83820] in North American Network Operators' Group
Re: Semi-on-topic: Light that travels faster than the speed of light?
daemon@ATHENA.MIT.EDU (Jay R. Ashworth)
Fri Aug 26 10:45:27 2005
Date: Fri, 26 Aug 2005 10:44:47 -0400
From: "Jay R. Ashworth" <jra@baylink.com>
To: nanog@merit.edu
In-Reply-To: <a193eb4d05082212314a7fb1e1@mail.gmail.com>; from Steve Meuse <smeuse@gmail.com> on Mon, Aug 22, 2005 at 01:31:36PM -0600
Errors-To: owner-nanog@merit.edu
On Mon, Aug 22, 2005 at 01:31:36PM -0600, Steve Meuse wrote:
> On 8/21/05, Peter Dambier <[1]peter@peter-dambier.de> wrote:
> I have had a look into one of my microwave books. I have seen in
> coax cables the speed of lite drop to 90% or 80% depending on the
> insulator, the dielectric.
>
> I believe this is referred to as "velocity factor".
Not the speed of light; the speed at which the electromagnetic
wavefront travels through *that* conductor. Yep; this is velocity
factor. It can go down surprisingly far.
Cheers,
-- jra
--
Jay R. Ashworth jra@baylink.com
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