FACTOID # 14: North Carolina has a larger Native American population than North Dakota, South Dakota and Montana combined.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Metamaterials

A Metamaterial is a composite material that has electromagnetic properties unlike the materials of origin. Especially those materials that exhibit traits otherwise nonexistant in nature, such as Negative Refraction. Composite materials (or composites for short) are engineering materials made from two or more components. ... Electromagnetism is the physics of the electromagnetic field: a field, encompassing all of space, composed of the electric field and the magnetic field. ...


Negative refraction is a trait desired for the creation of near perfect lenses. A lens is: a part of the eye an optical device that may be used in a camera or in a telescope; see lens (optics). ...


External links and sources

  • DARPA Defense Sciences Office - Meta Materials
  • Metamaterials.net
  • Metamaterial: Information from Answers.com

  Results from FactBites:
 
Metamaterial - Wikipedia, the free encyclopedia (1208 words)
Metamaterials are promising for a diversity of optical/microwave applications, such as new types of beam steerers, modulators, band-pass filters, superlenses, microwave couplers, and antenna radomes.
Microwave frequency metamaterials are almost always artificial, constructed as arrays of current-conducting elements (such as loops of wire) that have suitable inductive and capacitive characteristics.
Duke University is currently researching this use of metamaterials and has managed to use metamaterials to cloak an object (in the microwave spectrum) using special concentric rings; the microwaves were barely affected by the presence of the cloaked object.
Metamaterials could transform antenna design (August 2005) - Features - Wireless Web (1306 words)
Metamaterials are a new class of man-made materials that can be engineered to respond to electromagnetic (EM) fields in unconventional ways.
Indeed, metamaterials could play a key role in the future implementation of full MIMO systems, which require multiple antennas at both the base station and the handset.
He describes how metamaterials with high electric permittivity may be used for capturing and manipulating the near-field components of electromagnetic waves.
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m