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   Author  Topic: Invisibility  (Read 327 times)
Whiskey Tango Foxtrot
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Invisibility  
« on: Oct 31st, 2006, 3:24pm »
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This happened about two weeks ago:
http://news.bbc.co.uk/2/hi/science/nature/5016068.stm
 
Thoughts?
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Re: Invisibility  
« Reply #1 on: Oct 31st, 2006, 3:36pm »
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As I recall it only works somewhat for microwaves at the moment. But it's hardly perfect cloaking, how much it can be improved is a bit of a question (light moving through the 'cloak' would be slower then the light around it. So with the right frequency modulation you should be able to see it, even if the cloak works otherwise perfectly.)
And of course there's a serious question about whether it would work on anything other than a stationary object. Even aside from exhaust fumes, heat, airholes etc.
« Last Edit: Oct 31st, 2006, 3:36pm by towr » IP Logged

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Whiskey Tango Foxtrot
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Re: Invisibility  
« Reply #2 on: Oct 31st, 2006, 5:00pm »
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You're right, of course.  It only works for radio waves right now and only in two dimensions, but the people behind it believe they can extend the technology to some parts of the visible spectrum.   While I too wondered about whether it could be applied to a moving object, I think that so long as the object is moving at speed significantly less than the speed of light, it should still work relatively well.  This is absolute conjecture, but it seems plausible.
« Last Edit: Oct 31st, 2006, 6:20pm by Whiskey Tango Foxtrot » IP Logged

"I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use." - Galileo Galilei
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