can we make something invisible by converting the visible light being reflected by it into any other invisible rays. e.g. x rays, microwaves, infrared etc. Is it possible to do it by increasing or decreasing its wave length? if yes then how?
2006-12-26 13:43:28 · 15 answers · asked by behroz_ahmedali 2 in Science & Mathematics ➔ Physics
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The only invisibility technique I've seen is a suit containing thousands of small cameras and small screens. When you look at one side of the person in the suit, you see the screens displaying an image of a camera shot image of whatever is behind the person. The technique basically shows you what is behind the person making them seem transparent.
There is also optical camouflage. Same concept of images from behind being fed to the front so a person sees whats behind an object. Gadomsky's technology is completely different than existing methods of optical camouflage that exist today. In 2003, the TACHI laboratory of the University of Tokyo demonstrated an "invisibility cloak" -- which was actually no more than a projection of the image behind the cloak projected back onto the cloak. Gadomsky plans to actually disrupt the radiation in such a manner to "bend" light around the stealthed object behind the nanoparticle wall.
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2006-12-26 13:49:06 · answer #1 · answered by Fun Haver 3 · 1⤊ 1⤋
Is invisibility possible? Yes.
Your way? No. Sorry.
First of all, I thought about your idea for a while myself until I finally realized: from the person who's looking for you's perspective, there'd be a black spot where you went invisible, which could be a problem. Not only can he not see you, he also NEEDS to see what is behind you! Another person mentioned that you might be able to use cameras or something to recreate what he/she should see. IF that's possible, it would be very hard, expensive, etc.
However, there are also things called metamaterials. They're relatively new on the block, and they cause light to bend around them in such a way that anything inside a metamaterial shell would look invisible. There was an article about it in either Discover or Popular Science within the last few months. They're not very good yet, as they can only work for small things and even then not in enough wavelenghts, but someday they might be useful, at least for small objects. Just don't get any high hopes quite yet!
2006-12-26 23:02:52 · answer #2 · answered by beethovens_sixth 3 · 0⤊ 0⤋
Invisibility can be acheived by bending light rays around an object through the application of materials with a negative refractive index. This has been demonstrated using microwave frequencies, and can be used to make objects "invisible" to radar systems. The wavelength of visible light is so small that it will likely be a very long time before any kind of invisibility system using visible light is developed. The distinction should be made between true invisibility and camoflauge.
Actually, you can make yourself "invisible" by travelling at very high speeds (where relativistic effects come into play). The frequency of the light that you emitt or reflect will be raised or lowered by the doppler effect. You would still be visible, but your light would be shifted in frequency.
2006-12-26 22:14:33 · answer #3 · answered by Jess 2 · 3⤊ 0⤋
To convert it to other rays, you would need to convert it back into light rays when it reaches the eyes, or else there would just be a black spot where the "invisible" object is.
The problem with James Bond's invisible car is parallax. There needs to be a 3-Dimensional projection of the background scenary with consideration to the parallax of the onlooker, or else the projected background will not match the audience's view of the background.
Supposedly, there is a successful attempt at invisibility a while ago. A whole ship of men disappeared in the Philadephia harbor, then when the ship reappeared the men had all disappeared. I'm not sure about the name of this project, but you could search it up?
2006-12-26 21:52:55 · answer #4 · answered by Anonymous · 1⤊ 0⤋
very possible. in-visible means not-visible. many things are not visible. poke me eyes out and everything will be invisible. lol. rather than working on all these suits lets just poke out eyes its even cost effective. JK. i am sure it will be a thing of the past very soon. they made things than can turn invisible but the only problem is it casts a shadow. they already got the technology, they are just improving it. :)
in simple... the way to do it is that what goes in must come out, just on the other end.
2006-12-27 01:21:45 · answer #5 · answered by philosopher 3 · 1⤊ 0⤋
Optics is a pretty interesting area in physics, and from some of the things I've seen I would say that sooner or later someone is going to think of some very good ways to make things invisible. However, one of the main things that leads to invention in the world is Necessity. What is the real necessity of making things invisible?
2006-12-26 22:19:53 · answer #6 · answered by travis R 4 · 0⤊ 1⤋
Government is working on invisibility for tanks, soldiers, planes, etc. They are using fiber optics to 'steer' light around the objects. Imagine an array of fiber optics in front of you that wrap around your body and face out behind you. Someone looking will see what is behind you.
2006-12-26 21:50:37 · answer #7 · answered by Anonymous · 0⤊ 1⤋
If you believe the guys on the Discovery channel, maybe in as little as 10 - 20 years
2006-12-26 22:04:39 · answer #8 · answered by netnazivictim 5 · 1⤊ 0⤋
As has already been mentioned, with the method you propose, the object will not be visible, but neither will anything behind it. So people will be able to see where it is, so in effect it's still visible.
2006-12-27 06:28:34 · answer #9 · answered by Dr Know It All 5 · 0⤊ 1⤋
not the way you say it(to the general publics' knowledge anyway). But there are ways to make thing 'disappear' or at least camouflaged. Jame Bond's invisible car is a real possibility, but don't take my word for it.
2006-12-26 21:47:18 · answer #10 · answered by my alias 4 · 0⤊ 1⤋