Berkeley CSUA MOTD:Entry 44883
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2025/04/04 [General] UID:1000 Activity:popular
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2006/10/20-23 [Uncategorized] UID:44883 Activity:nil
10/20   Negative index of refraction is k3wl:
        http://tinyurl.com/y8kmhs (techeblog.com)
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tinyurl.com/y8kmhs -> www.techeblog.com/index.php/tech-gadget/scientists-create-partial-invisibility-cloak
LiveScience, scientists "have created a cloaking device that can reroute certain wavelengths of light, forcing them around objects like water flowing around boulders in a stream." Video of a similar technology (optical camouflage) after the jump. "The microwaves come in and are swept around the cloak and reconstructed on the other side while avoiding the interior region," said study team member David Smith at Duke University's Pratt School of Engineering. "So it looks as if they just passed through free space." The technology mentioned in the text is real, too, but the image and video are totally unrelated. Notice that the David Smith, the quoted scientist, is talking about *microwaves*, not visible light. link "On October 19th, 2006 the AP reported that a team of British and American scientists had demonstrated a prototype metamaterial based device that rendered a copper cylinder invisible to microwaves. In the prototype, microwaves passing through the cloaked object were significantly dimmed but the researchers believe this behavior can be improved." link October 20th, 2006 2 Johnny FAKE>, what makes that ball and box only invisable? His hands and Head do not appear behind the object but only behinhd his body. MrWednesday Actually nuclearpotato31, you could do this effect with adobe after effects... Photoshop and Flash would be better for still images and it would be impractical for video...