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Old Jun 9th 2008, 10:00 AM   #1
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How to become invisible

Is there any optical illusion that can make a human being become invisible?
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Old Jun 9th 2008, 02:43 PM   #2
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Originally Posted by werehk View Post
Is there any optical illusion that can make a human being become invisible?
Define invisible. Humans, like any "hot" object, emit long wavelength radiation. Merely "lensing" the light around us wouldn't be enough: we'd have to also block the heat signature.

Now, if you merely mean can you make a human being invisible to optical wavelengths I suppose that might be possible to do if one is clever enough. But I'll bet there will be some kind of distortion of the light pattern surrounding the invisible person.

And of course, we are all practically invisible to ultra high energy gamma rays... (But I wouldn't want to stand in front of a high energy source: even one hit by the wavelength's I'm thinking of could be fatal.)

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Old Dec 14th 2008, 08:14 AM   #3
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Originally Posted by werehk View Post
Is there any optical illusion that can make a human being become invisible?
TO be invisible to a particular angle for visible light, we have to take alot of mirrors and arrange them around our body in such a way that they reflect whatevr light coming from vertically opposite side to the front.
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Old Jan 7th 2009, 10:34 PM   #4
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it is not a dream , actually , we can use Negative refraction materials to do a clothes , it is has been reported ! here is a link Negative Refraction of Visible Light Demonstrated; Could Lead to Cloaking Devices

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Old Mar 18th 2009, 11:21 PM   #5
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Invisible but blind

I dont kow how it can be done ,but if humans were to be made totally transparent in the optical region, they would become BLIND as the retina also would be transparent!
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Old Apr 28th 2014, 11:54 PM   #6
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TO be invisible to a particular angle for visible light
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