cloaking and invisibility devices

[bvonahsen]

via <!--EZCODE LINK START--><a href="http://www.boingboing.net/2006/05/25/cloaking_devices_des.html" target="top">Boingboing</a><!--EZCODE LINK END--><br><br>Cloaking devices described in scientific journal <br>Two papers (count 'em, two!) in this week's issue of Science describe the possibility and theoretical method to construct cloaking devices. (No demo devices as of yet.) Imperial College London physicist Sir John Pendry and his colleagues describe an approach based on metamaterials that could bend electromagnetic radiation, including light around an object. (<!--EZCODE LINK START--><a href="http://www.sciencemag.org/cgi/content/abstract/1125907v1?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=cloaking&searchid=1&FIRSTINDEX=0&resourcetype=HWCIT" target="top">Link</a><!--EZCODE LINK END--> to paper abstract.) Meanwhile, Ulf Leonhardt of the University of St. Andrews, writes about using metamaterials in "a general recipe for the design of media that create perfect invisibility within the accuracy of geometrical optics." (<!--EZCODE LINK START--><a href="http://www.sciencemag.org/cgi/content/abstract/1126493v1?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=Ulf+Leonhardt&searchid=1&FIRSTINDEX=0&resourcetype=HWCIT" target="top">Link</a><!--EZCODE LINK END--> to paper abstract.) From National Geographic News: <br><br><!--EZCODE QUOTE START--><blockquote><strong><em>Quote:</em></strong><hr>Invented six years ago, the man-made (metamaterials) are embedded with networks of exceptionally tiny metal wires and loops. <br><br>The structures refract, or bend, different types of electromagnetic radiation—such as radar, microwaves, or visible light—in ways natural substances can't. <br><br>"[Metamaterials] have the power to control light in an unprecedented way," said Sir John Pendry, a theoretical physicist at England's Imperial College London. <br><br>"They can actually keep it out of a volume of space, but they can do so without you noticing that there's been a local disturbance in the light..."<br><br>So far researchers have only developed metamaterials that divert radar and microwaves—rather than light waves, which are the key to invisibility. <br><br>While that's good news for Air Force generals who want to conceal warplanes, it's bad news for wannabe wizards hoping for a magic cloak.<hr></blockquote><!--EZCODE QUOTE END--> <br><br>As a general rule, if it's comming out now it was probably in use by the military 20 years ago or so.<br><br><!--EZCODE LINK START--><a href="http://news.nationalgeographic.com/news/2006/05/060525-invisibile.html" target="top">National Geographic News article</a><!--EZCODE LINK END--><br><!--EZCODE LINK START--><a href="http://news.bbc.co.uk/2/hi/s" target="top">BBC News report</a><!--EZCODE LINK END--> <p></p><i></i>

[Pah]

`The Philadelphia Project`<br><br><!--EZCODE AUTOLINK START--><a href="http://dialspace.dial.pipex.com/prod/dialspace/town/parade/henryr/philadelphia/">dialspace.dial.pipex.com/...ladelphia/</a><!--EZCODE AUTOLINK END--><br><br>Bermuda Triangle anyone?<br>P. <p></p><i>Edited by: <A HREF=http://p216.ezboard.com/brigorousintuition.showUserPublicProfile?gid=pah@rigorousintuition>Pah</A> at: 5/26/06 3:31 am<br></i>

[4911]

<!--EZCODE AUTOLINK START--><a href="http://news.bbc.co.uk/2/hi/asia-pacific/2777111.stm">news.bbc.co.uk/2/hi/asia-...777111.stm</a><!--EZCODE AUTOLINK END--><br><br><br>seen this?<br> (no pun intended) <p></p><i></i>