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Scientists Develop Invisibility Cloak
BBC ^ | 10-19-06 | Paul Rincon

Posted on 10/19/2006 4:29:28 PM PDT by grandpa jones

A US-British team of scientists has successfully tested a cloak of invisibility in the laboratory.

The device mostly hid a small copper cylinder from microwaves in tests at Duke University, North Carolina.

It works by deflecting the microwaves around the object and restoring them on the other side, as if they had passed through empty space.

But making an object vanish before a person's eyes is still the stuff of science fiction - for now.

We've opened the door into the secret garden Prof John Pendry, Imperial College London The cloak consists of 10 fibreglass rings covered with copper elements and is a "metamaterial" - an artificial composite that can be engineered to produce a desired change in the direction of electromagnetic waves.

This is done by tinkering with the physical structure of the material, not by altering its chemistry. In this case, the precise variations in the shape of copper elements patterned on to the ring surfaces determines their properties.

Like light waves, microwaves bounce off objects, making them visible and creating a shadow. But at microwave frequencies the detection has to be made by instruments rather than the naked eye.

(Excerpt) Read more at news.bbc.co.uk ...


TOPICS: Business/Economy; News/Current Events
KEYWORDS: invisibility; science; usbritish

1 posted on 10/19/2006 4:29:30 PM PDT by grandpa jones
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To: grandpa jones

Will this thing help me sneak into the chearleaders' locker room or not?


2 posted on 10/19/2006 4:30:23 PM PDT by Bronco_Buster_FweetHyagh
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To: Bronco_Buster_FweetHyagh
Will this thing help me sneak into the chearleaders' locker room or not?

Prepare yourself for an even bigger let-down than those X-Ray glasses you bought.

3 posted on 10/19/2006 4:32:31 PM PDT by Recovering Hermit (There's another old saying Senator..."Don't piss down my back and tell me it's raining.")
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To: Recovering Hermit

I bought some of those X-Ray glasses but people could still see me


4 posted on 10/19/2006 4:33:10 PM PDT by bobdsmith
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To: grandpa jones

The Philadelphia Experiment, redux.


5 posted on 10/19/2006 4:34:07 PM PDT by neodad (USS Vincennes (CG-49) Freedom's Fortress)
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To: grandpa jones

"Whaddya mean, they've already got a cloaking device? What did I get dressed up for like this, then? Wait a minute...why is everybody giggling?"

6 posted on 10/19/2006 4:38:29 PM PDT by WestVirginiaRebel (Common sense will do to liberalism what the atomic bomb did to Nagasaki-Rush Limbaugh)
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To: grandpa jones

"A US-British team of scientists has successfully tested a cloak of invisibility in the laboratory."

----Old News. The Klingons have had it for quite some time.


7 posted on 10/19/2006 4:57:45 PM PDT by Uncle Chip
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To: Uncle Chip
----Old News. The Klingons have had it for quite some time.

Well, and Harry Potter, of course.

8 posted on 10/19/2006 5:01:29 PM PDT by Dianna
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Comment #9 Removed by Moderator

To: grandpa jones

This is not new. I have been invisible for a long time. Every time I talk to a hottie, she acts as if I'm not there.


10 posted on 10/19/2006 5:19:21 PM PDT by twoputt
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To: grandpa jones

As is often the case, the hype is less than the reality.


11 posted on 10/19/2006 5:20:07 PM PDT by Brilliant
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To: grandpa jones
OK. It's invisible (low return loss or reflection coefficient) at a certain frequency. Just set up a network analyzer as a reciever and sweep all the bands up to 50 GHz. Chances are that this item will only be "invisible" in a very narrow frequency range, because it's TUNED for that frequency.

Give ME a gov't grant for this. I could do this half-asleep at 5:30 on a Monday morning. Without a A US-British team of scientists to split the grant with!

12 posted on 10/19/2006 5:20:09 PM PDT by BobS
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To: bushbuddy
Every time I talk to a hottie, she acts as if I'm not there

....Hey, Its more common than you think. :(
...yhea....me too.

13 posted on 10/19/2006 5:26:20 PM PDT by skinkinthegrass (Just b/c your paranoid; Doesn't mean they're NOT out to get you. :^)
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To: bushbuddy
"Every time I talk to a hottie, she acts as if I'm not there.

Just say something that has 2 or more meanings and try to look innocent. The 'dear in the headlights' look means you buzzed them out, or short circuited them, whatever. Now you have her attention. Use it wisely. Simple, up-front and fun for both of you.

I am with someone and am not a pick-up artist. This is how I got my foot in the door for a long time.

14 posted on 10/19/2006 6:05:41 PM PDT by BobS
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To: John Williams
"Could this possibly lead to fighter aircraft that's truly invisible to radar? Just a question."

Yes. Composite material can be mixed and formed with graphite and 2 other substances that absorb microwave energy instead of reflecting it. Form also matters- sharp edges reflect microwave energy. The problem is with the tons of weapons that must lock under the wings.

Composite material can also be made to reflect with the use of anodized aluminum powder and 1 or 2 orher metal powders to make cosecant^2 antennas with high gain and narrow beamwidth. Those are used on AC-130 gunships. That's not classified.

15 posted on 10/19/2006 6:27:52 PM PDT by BobS
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To: bushbuddy
I dated a girl that asked me if I believed in witchcraft. I told her no, so she bit me on the ear and I turned into a motel.
16 posted on 10/19/2006 6:31:32 PM PDT by Richard Kimball (The most important thing is sincerity. Once you can fake that, everything else is easy.)
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To: bushbuddy

"I have been invisible for a long time. Every time I talk to a hottie, she acts as if I'm not there."

----- You have a great gift, my son, use it discretely.


17 posted on 10/19/2006 6:50:44 PM PDT by Uncle Chip
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To: Richard Kimball
"I told her no, so she bit me on the ear and I turned into a motel."

You didn't follow through, though. The next time you went out you should have let her drive and licked her up the cheek to the earlobe to find out where she goes.

I guess I'm the only microwave engineer here. I thought this was going to be a tech discussion about physics. Logic only gets you so far with sweethearts, but it can be fun. Hearts take over when they to come together.

18 posted on 10/19/2006 7:18:41 PM PDT by BobS
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