Latest Cloak of invisibility Stories

2011-08-15 15:31:22

Optical cloaking devices that enable light to gracefully slip around a solid object were once strictly in the realm of science fiction. Today they have emerged as an exciting area of study, at least on microscopic scales. A new twist on this intriguing technology can now be "seen" in the field of acoustics. A team of researchers from the Universitat Politecnica de Valencia and the Universidad de Valencia have created a prototype of an acoustic cloak by using a 2-D mathematical model. Unlike...

2011-08-09 10:10:00

Despite becoming a popular idea through science fiction, fantasy novels and films, a cloak that renders its wearer invisible is usually dismissed as impossible. However this does not dissuade some researchers from exploring the idea of it, International Business Times is reporting. An undergraduate student has published a study that could open up the possibility for a potential invisibility cloak wearer to move around amongst ever-changing backgrounds of a variety of colors. Under the...

2011-07-01 12:49:36

In this month's special issue of Physics World, which examines the science and applications of invisibility, Martin McCall and Paul Kinsler of Imperial College London describe a new type of invisibility cloak that does not just hide objects "“ but events. Using the ultimate bank heist as an example, McCall and Kinsler explain how a thief could, in principle, use an "event cloak" to steal money from a safe, without even the CCTV surveillance cameras being aware. The burglar would somehow...

2011-06-25 07:39:27

Scientists have developed a new device that makes objects invisible to sound waves. The approach borrows ideas from attempts to "cloak" objects from light. The scientists said it uses simple plastic sheets with arrays of holes, and could be put to use in making ships invisible to sonar or in an acoustic design for concert halls. Researchers have put forth effort to try and create "invisibility cloaks" since the feasibility of the idea was theorized in 2006. Those approaches are based on...

2011-05-19 09:39:31

CFN Scientists at KIT Achieve Optical Invisibility in the Visible Light Spectrum "Seeing something invisible with your own eyes is an exciting experience," say Joachim Fischer and Tolga Ergin. For about one year, both physicists and members of the team of Professor Martin Wegener at KIT's Center for Functional Nanostructures (CFN) have worked on refining the structure of the Karlsruhe invisibility cloak to such an extent that it is also effective in the visible spectral range. In invisibility...

2011-04-28 00:24:42

Researchers at Northwestern University have created a new kind of cloaking material that can render objects invisible in the terahertz range. Though this design can't translate into an invisibility cloak for the visible spectrum, it could have implications in diagnostics, security, and communication. The cloak, designed by Cheng Sun, assistant professor of mechanical engineering at Northwestern's McCormick School of Engineering and Applied Science, uses microfabricated gradient-index...

2011-04-20 09:13:50

Optical cloaking approach described in Optics Express shows potential for myriad futuristic applications Invisibility cloaks are seemingly futuristic devices capable of concealing very small objects by bending and channeling light around them. Until now, however, cloaking techniques have come with a significant limitation"”they need to be orders of magnitude larger than the object being cloaked. This places serious constraints on practical applications, particularly for the...

2011-04-05 17:56:10

A very simple bench-top technique that uses the force of acoustical waves to create a variety of 3D structures will benefit the rapidly expanding field of metamaterials and their myriad applications"”including "invisibility cloaks." Metamaterials are artificial materials that are engineered to have properties not found in nature. These materials usually gain their unusual properties"”such as negative refraction that enables subwavelength focusing, negative bulk modulus, and band...

2011-03-02 13:26:47

With NSF support, Elena Semouchkina and colleagues are experimenting with ways of using magnetic resonance to capture rays of visible light and route them around objects, rendering those objects invisible to the human eye By Marlene Cimons, National Science Foundation In 1897, H.G. Wells created a fictional scientist who became invisible by changing his refractive index to that of air, so that his body could not absorb or reflect light. More recently, Harry Potter disappeared from sight after...

2011-02-02 06:00:00

Researchers in Britain and Denmark have unveiled an "Ëœinvisibility cloak' that uses a common crystalline material known as calcite, which works by sending its two "polarizations" of light in different directions. Cloaking involves guiding light waves in such a way that waves from a hidden object do not reach the eye.  By using calcite, the researchers created an "Ëœinvisibility cloak' that hid a small (inch-size), three-dimensional object.  However, the size of...

Word of the Day
  • Licking.
  • Hence Running along or over a surface, as if in the act of licking; flowing over or along; lapping or bathing; softly bright; gleaming.
This word comes the Latin 'lambere,' to lick.