2007-03-15 07:36:58 · 7 answers · asked by Alexander 6 in Science & Mathematics ➔ Physics
http://www.cbc.ca/technology/story/2006/10/19/invisibility-cloak.html
I don't think it'll be anytime soon before the public would be able to play with it, but it's kind of neat that they made something like that.
2007-03-15 07:40:55 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Theyve made a invisibility cloak for a very small particle being invisible to infra red light.
I read an article in New Scientist about it. I'll see if i can find it.
2007-03-15 14:56:32 · answer #2 · answered by Oz 4 · 0⤊ 0⤋
We've already all heard about "meta-materials" with unusual indices of refraction that allows EM radiation to "wrap around" an interior cavity, rendering it invisible, so "in principle" it's possible. But if we want a practical cloak that functions as a skin which renders the wearer invisible, we can start with the chameleon concept already being investigated by the military. A flexible suit of a nanotechnology-laden fabric combination of cameras and display pixels captures incoming visible images, computes what it should look like on the OTHER side of the wearer, and display them. This is really the updated version of the GI issue camouflage uniform. The problem with this is that it cannot accurately simulate true "transparency", so that the wearer would be like the alien in "Predator". So, we can think about the next level, which is as follows:
Holograms are able to recreate true 3D EM radiation because phase information is also "recorded" and stored in diffraction form in a 3D medium (yes, this is something that escapes a lot of people, a hologram is not a 2D medium, but has a necessary thickness). If the cloaking suit is able to not only record incoming light intensities from different directions, but phase information as well, and that the suit is able to recreate EM radiation much like how phased array radars work, then, yes, it would be possible to achieve true "transparency" for the wearer. It is extremely difficult to duplicate what phased array radars do with radio waves at visible light frequencies, but not impossible in theory. It would absolutely necessitate the use of "meta-materials", but the possibility should nonetheless exist.
2007-03-15 16:09:10 · answer #3 · answered by Scythian1950 7 · 1⤊ 0⤋
they have made a temporary one, but your not completely invisible just partialy
2007-03-15 14:44:27 · answer #4 · answered by Conor 3 · 0⤊ 0⤋
Just don't let people try them on before paying for them!
2007-03-15 14:44:44 · answer #5 · answered by Anonymous · 1⤊ 0⤋
Yes. Research is already being conducted on it.
2007-03-15 14:41:08 · answer #6 · answered by deadstick325 3 · 0⤊ 0⤋
I actually constructed one, but now I can't find it
2007-03-15 14:53:08 · answer #7 · answered by Richard P 1 · 1⤊ 1⤋