http://www.geeksaresexy.net/2008/10/20/harry-potters-invisibility-cloak-will-be-here-in-5-years/ tech, science, news and social issues for geeks Sat, 21 Nov 2009 16:46:41 -0800 http://wordpress.org/?v=abc hourly 1 http://www.geeksaresexy.net/2008/10/20/harry-potters-invisibility-cloak-will-be-here-in-5-years/#comment-112026 GadgetNut Tue, 21 Oct 2008 15:06:34 +0000 http://www.geeksaresexy.net/?p=6501#comment-112026 "Black Ops" agencies will be wanting the first units, naturally. Then BATFE and the IRS next, no doubt.. ;-) “Black Ops” agencies will be wanting the first units, naturally. Then BATFE and the IRS next, no doubt.. ;-)

]]> http://www.geeksaresexy.net/2008/10/20/harry-potters-invisibility-cloak-will-be-here-in-5-years/#comment-112003 phil Tue, 21 Oct 2008 12:31:19 +0000 http://www.geeksaresexy.net/?p=6501#comment-112003 Somebody completely enclosed by an invisibility cloak would not be able to see out -- the light coming in that would normally hit your eyeballs (or a sensor like a video camera) would be routed around to make you invisible from the rear. This could be mitigated by, I suppose, deciding you only wanted to be invisible when viewed from certain directions, or you could poke a small hole in the cloak to see out, or you could design the cloak to allow a small frequency band in so you could still see. But each one of these is a compromise that degrades the cloaking ability. And, it doesn't address issues with radiation being generated from WITHIN the cloak (example: engine heat). Somebody completely enclosed by an invisibility cloak would not be able to see out — the light coming in that would normally hit your eyeballs (or a sensor like a video camera) would be routed around to make you invisible from the rear. This could be mitigated by, I suppose, deciding you only wanted to be invisible when viewed from certain directions, or you could poke a small hole in the cloak to see out, or you could design the cloak to allow a small frequency band in so you could still see. But each one of these is a compromise that degrades the cloaking ability. And, it doesn’t address issues with radiation being generated from WITHIN the cloak (example: engine heat).

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