Group: sci.physics.electromag
From: "Autymn D. C."
Date: Tuesday, February 12, 2008 8:15 PM
Subject: Re: Group Velocity and Velocity Factor

On Feb 12, 2:45=A0pm, John Fields wrote:
> Likening it to a pair of scissors closing while cutting through a
> sheet of paper, the group velocity would be the speed of the ends of
> the blades approaching each other, while the phase velocity would be
> the speed of propagation of the cut as the blades sliced the paper

if...