Latest Cloak and Dagger Stories

2011-09-24 07:48:41

A team of Spanish researchers claim to have designed what is being called an antimagnetic cloak -- a cloak that shields objects from external magnetic fields, while keeping internal magnetic fields from escaping. According to a September 22 press release, physicists and engineers from the Universitat Autònoma de Barcelona (UAB) designed the cloak, which they said can be created "using practical and available materials and technologies." Richard Chirgwin of The Register...

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...

2011-02-02 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...

2009-04-30 11:00:54

Two teams of scientists have developed a cloak that renders objects invisible to near-infrared light, BBC News reported. The new technology, however, does not contain metals unlike previous such "cloaks" that resulted in imperfect cloaking because of losses of light. Researchers say that since the approach can be scaled down further in size, the new technology is a major step towards a cloak that would work for visible light. John Pendry from Imperial College London first theorized a cloak...

Word of the Day
  • A Roman unit of weight, 1⁄1728 of a pound.
  • A weight of four grains used in weighing gold and precious stones; a carat.
  • In anatomy, a formation suggesting a husk or pod.
  • The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
  • A coin of base silver of the Gothic and Lombard kings of Italy.
'Siliqua' comes from a Latin word meaning 'a pod.'