Re: negative permeability and permittivity

[Bob Sciamanda <trebor@VELOCITY.NET>]

The implications of a negative index of refraction are easily shown
graphically and numerically with my FREE ray tracing program "Snell
Trace".  Win 3x and Win 9x versions are downloadable from the last link
cited on my home page.

Bob

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor


----- Original Message -----
From: "Timothy S. Sullivan" <sullivan@KENYON.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Sunday, March 26, 2000 12:25 PM
Subject: Re: negative permeability and permittivity
> . . .
> Perhaps the surprising claim is one that they have not yet demonstrated.
> It would essentially reverse our usual thoughts about Snell's Law. For
> example, we are familiar with the demonstration that a light ray
> travelling through a flat slab of material will emerge parallel to its
> incident direction. Not so if the medium has an effectively negative
> dielectric coefficient. In fact, if this is right, a flat slab could be
> made to focus incident waves. (I haven't thought about this enough to
> give a better explanation . . .

> Tim Sullivan
> sullivan@kenyon.edu