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A cloak of invisibility is an item that prevents the wearer from being seen. In folklore, mythology and fairy tales, a cloak of invisibility appears either as a magical item used by duplicitous characters or an item worn by a hero to fulfill a quest.
Sir John Brian Pendry, FRS HonFInstP (born 4 July 1943 [2] [3]) is an English theoretical physicist known for his research into metamaterials and creation of the first practical "Invisibility Cloak". He is a professor of theoretical solid state physics at Imperial College London where he was head of the department of physics (1998–2001) and ...
Metamaterial cloaking is the usage of metamaterials in an invisibility cloak. This is accomplished by manipulating the paths traversed by light through a novel optical material. This is accomplished by manipulating the paths traversed by light through a novel optical material.
If you ever hoped an invisibility cloak was a real thing, you will be happy to know that one now exists. Unfortunately, it will only work on something incredibly small, specifically microscopic.
An invisibility cloak using active camouflage by Susumu Tachi. Left: The cloth seen without a special device. Left: The cloth seen without a special device. Right: The same cloth seen through the half-mirror projector part of the Retro-Reflective Projection Technology
Theories of cloaking discusses various theories based on science and research, for producing an electromagnetic cloaking device.Theories presented employ transformation optics, event cloaking, dipolar scattering cancellation, tunneling light transmittance, sensors and active sources, and acoustic cloaking.
Invisibility cloak (Harry Potter), a specific instance in the Harry Potter series; Cloaking device, technology for partial or full invisibility to parts of the electromagnetic or acoustic spectrums Metamaterial cloaking, a type of cloaking using metamaterials; Cap of invisibility (aidos kyneê in Greek), a mysterious helmet or cap that ...
Soldiers often wrongly viewed camouflage netting as a kind of invisibility cloak, and they had to be taught to look at camouflage practically, from an enemy observer's viewpoint. [66] [67] At the same time in Australia, zoologist William John Dakin advised soldiers to copy animals' methods, using their instincts for wartime camouflage. [68]