more on The Economist: How to weave a cloak that makes you invisible

[David Farber <dave () farber net>]

Begin forwarded message:

From: Ed Gerck <egerck () nma com>
Date: May 26, 2006 2:10:32 PM EDT
To: dave () farber net
Cc: ip () v2 listbox com
Subject: Re: [IP] The Economist: How to weave a cloak that makes you  
invisible


>  From The Economist print edition
> http://www.economist.com/science/displaystory.cfm?story_id=6971134
> How to weave a cloak that makes you invisible

The invisibility claim does not follow from the theory. The  
electromagnetic,
waves, even if they maintain the exact same path and polarization  
after the
object, will be delayed by "going around". Since the speed of light  
cannot
increase beyond c, there is no way to make up for the delay. The  
object can
be seen by a simple interferometer arrangement.

Cheers,
Ed Gerck, Ph.D.


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