RobertWeyer wrote: > Working invisibility cloak created at last > > An invisibility cloak that works in the microwave region of the > electromagnetic spectrum has been unveiled in the US. While not quite > as effective as Star Trek's invisibility cloaking device, here is the > first practical version of a theoretical set-up first suggested by > physicists earlier this year. > > About the size of a movie reel canister, the cloak works by steering > microwave light around an object, making it appear to an observer as if > it were not there at all. > > Read the full story here: > http://email.newscientist.com/cgi-bin1/DM/y/ewao0MZj540VSV0DTdF0An That's a fascinating article, thanks. It is even more so for me, because I encountered an instance of this in the lab at CIT many years ago. This one worked in the visible spectrum. It was a pure fluke. A test tube contained a solution of ferric chloride. When a glass rod was placed in it, the part in the liquid was completely invisible. The reason was simple: Somehow, the solution and the rod had IDENTICAL refractive indices, so the light was not bent or refracted by the glass. Hence it became totally invisible. I have yet to see anything else like it. -- Regards, John Durham <http://modecideas.com/contact.html?sig> ICQ number 112663246 Fax/Phone 64 4 5286786 Award winning web site at http://modecideas.com?sig Order my latest e-book at http://modecideas.com/dmaxhits.htm?sig PC-HELPERS list subscribe/unsub at http://modecideas.com/discuss.htm?sig Good advice is like good paint- it only works if applied. -- -------list-services-below----------- Regards, John Durham (list moderator) <http://modecideas.com/contact.html?sig> Freelists login at http://www.freelists.org/cgi-bin/lsg2.cgi List archives at http://www.freelists.org/archives/pchelpers PC-HELPERS list subscribe/unsub at http://modecideas.com/discuss.htm?sig Latest news live feeds at http://modecideas.com/indexhomenews.htm?sig Good advice is like good paint- it only works if applied.