Cloaking ~~~ A Mathematical Reality

Nomad · 04-09-2007, 02:10 PM

Metamaterial Electromagnetic Cloak at Microwave Frequencies

D. Schurig,1 J. J. Mock,1 B. J. Justice,1 S. A. Cummer,1 J. B. Pendry,2 A. F. Starr,3 D. R. Smith1*
A recently published theory has suggested that a cloak of invisibility is in principle possible, at least over a narrow frequency band. We describe here the first practical realization of such a cloak; in our demonstration, a copper cylinder was "hidden" inside a cloak constructed according to the previous theoretical prescription. The cloak was constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies. The cloak decreased scattering from the hidden object while at the same time reducing its shadow, so that the cloak and object combined began to resemble empty space.

chonsigirl · 04-09-2007, 02:11 PM

You mean you are using microwaves to be invisible, instead of cooking me dinner!

Sheryl · 04-09-2007, 02:13 PM

The manual sais no metal products in the microwave.

chonsigirl · 04-09-2007, 02:14 PM

That includes tinfoil too, Nomad..........................

minks · 04-09-2007, 02:17 PM

oh oh too much thinking for you Nomad.

spot · 04-09-2007, 02:17 PM

He's after a Nobel Prize, all he needs do is widen the frequency band, work out how to shift it down the spectrum and get it working in 3D. It's probably easier to go for the Peace Prize instead, Nomie, fixing Palestine is simpler than Physics.

04-09-2007, 02:41 PM

I have had a cloaking device for a number of years now. I'm bliddy invisible to my mother in law.

koan · 04-09-2007, 02:47 PM

well, if all the mathematicians suddenly disappear we'll know what happened.
they might be disappointed when no one goes looking for them though.

Nomad · 04-10-2007, 05:05 AM

Ok children.....they have discovered a way to cloak objects by bending light. The possibilities are fascinating. Why we could roll right into Syria and blow them up and they would never know what hit them.

Im sure the Army is salivating over this.
On a more practical everyday man level, think of the people we could trip, or the candy we could steal.
Our leaps and bounds are coming in shorter and shorter steps. The last 100 yrs were just the baby steps. The walking and eventually running is coming to fruition right before your eyes, in your lifetime.
Soon enough we will understand what lies beyond the cosmo's and then.............................

zinkyusa · 04-10-2007, 05:08 AM

aren't the Klingons already doing this?

04-09-2007, 02:10 PM	#1 (permalink)
Nomad LIFE IS SHORT...LIVE HARD Supporting Member Join Date: Jun 2005 Location: LOOK BEHIND YOU Posts: 25,054	Cloaking ~~~ A Mathematical Reality Metamaterial Electromagnetic Cloak at Microwave Frequencies D. Schurig,1 J. J. Mock,1 B. J. Justice,1 S. A. Cummer,1 J. B. Pendry,2 A. F. Starr,3 D. R. Smith1* A recently published theory has suggested that a cloak of invisibility is in principle possible, at least over a narrow frequency band. We describe here the first practical realization of such a cloak; in our demonstration, a copper cylinder was "hidden" inside a cloak constructed according to the previous theoretical prescription. The cloak was constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies. The cloak decreased scattering from the hidden object while at the same time reducing its shadow, so that the cloak and object combined began to resemble empty space. __________________
Local Time: 05:17 PM Local Date: 03-20-2010

04-09-2007, 02:11 PM	#2 (permalink)
chonsigirl I think, therefore I post Supporting Member Join Date: Mar 2005 Location: Nirvana Posts: 32,064	Re: Cloaking ~~~ A Mathematical Reality You mean you are using microwaves to be invisible, instead of cooking me dinner!
Local Time: 06:17 PM Local Date: 03-20-2010

04-09-2007, 02:13 PM	#3 (permalink)
Sheryl doobie doobie doooo Join Date: Feb 2005 Location: Texas Posts: 8,646	Re: Cloaking ~~~ A Mathematical Reality The manual sais no metal products in the microwave. __________________ "Girls are crazy! I'm not ever getting married, I can make my own sandwiches!" my son
Local Time: 04:17 PM Local Date: 03-20-2010

04-09-2007, 02:14 PM	#4 (permalink)
chonsigirl I think, therefore I post Supporting Member Join Date: Mar 2005 Location: Nirvana Posts: 32,064	Re: Cloaking ~~~ A Mathematical Reality That includes tinfoil too, Nomad..........................
Local Time: 06:17 PM Local Date: 03-20-2010

04-09-2007, 02:17 PM	#5 (permalink)
minks superstar Supporting Member Join Date: Dec 2004 Location: igloo apparently Posts: 25,687	Re: Cloaking ~~~ A Mathematical Reality oh oh too much thinking for you Nomad.
Local Time: 04:17 PM Local Date: 03-20-2010

04-09-2007, 02:17 PM	#6 (permalink)
spot Ichabod Supporting Member Join Date: Apr 2005 Location: Brigstowe Posts: 21,817	Re: Cloaking ~~~ A Mathematical Reality He's after a Nobel Prize, all he needs do is widen the frequency band, work out how to shift it down the spectrum and get it working in 3D. It's probably easier to go for the Peace Prize instead, Nomie, fixing Palestine is simpler than Physics. __________________ . Who has a spare two minutes a day to play in this month's FG Trivia game - we need additional players to make it more exciting and you'll be welcomed.
Local Time: 10:17 PM Local Date: 03-20-2010

04-09-2007, 02:41 PM	#7 (permalink)
Soberano Guest Posts: n/a	Re: Cloaking ~~~ A Mathematical Reality I have had a cloaking device for a number of years now. I'm bliddy invisible to my mother in law.

04-09-2007, 02:47 PM	#8 (permalink)
koan anyone care for a mint? Supporting Member Join Date: Oct 2004 Location: Canada Posts: 13,127	Re: Cloaking ~~~ A Mathematical Reality well, if all the mathematicians suddenly disappear we'll know what happened. they might be disappointed when no one goes looking for them though. __________________ Having the right to an opinion does not make your opinion right.
Local Time: 03:17 PM Local Date: 03-20-2010

04-10-2007, 05:05 AM	#9 (permalink)
Nomad LIFE IS SHORT...LIVE HARD Supporting Member Join Date: Jun 2005 Location: LOOK BEHIND YOU Posts: 25,054	Re: Cloaking ~~~ A Mathematical Reality Ok children.....they have discovered a way to cloak objects by bending light. The possibilities are fascinating. Why we could roll right into Syria and blow them up and they would never know what hit them. Im sure the Army is salivating over this. On a more practical everyday man level, think of the people we could trip, or the candy we could steal. Our leaps and bounds are coming in shorter and shorter steps. The last 100 yrs were just the baby steps. The walking and eventually running is coming to fruition right before your eyes, in your lifetime. Soon enough we will understand what lies beyond the cosmo's and then............................. __________________
Local Time: 05:17 PM Local Date: 03-20-2010

04-10-2007, 05:08 AM	#10 (permalink)
zinkyusa gangsta' Join Date: Aug 2006 Location: suckin' peoples blood Posts: 3,280	Re: Cloaking ~~~ A Mathematical Reality aren't the Klingons already doing this? __________________ You have the right to remain silent. Anything you say will be misquoted, then used against you.
Local Time: 06:17 PM Local Date: 03-20-2010

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