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A cloaking device is a hypothetical or fictional stealth technology that can cause objects, such as spaceships or individuals, to be partially or wholly invisible to parts of the electromagnetic (EM) spectrum. Fictional cloaking devices have been used as plot devices in various media for many years.
The first electromagnetic cloaking device was produced in 2006, using gradient-index metamaterials.This has led to the burgeoning field of transformation optics (and now transformation acoustics), where the propagation of waves is precisely manipulated by controlling the behaviour of the material through which the light (sound) is travelling.
The purpose of a cloaking device is to hide something, so that a defined region of space is invisibly isolated from passing electromagnetic fields (or sound waves), as with Metamaterial cloaking. [5] [13] Cloaking objects, or making them appear invisible with metamaterials, is roughly analogous to a magician's sleight of hand, or his tricks ...
The concept of a cloaking device has a lot of appeal and though we're far from being able to make 3D objects invisible to the human eye, researchers continue to develop new ways in which to shield ...
The Predator franchise has spawned five movies — including the upcoming prequel film, Prey — and two crossover flicks pitting the titular predator against alien xenomorphs, not to mention ...
When the commander goes to change her attire, Spock directs Kirk, via communicator, to the location of the cloaking device. His signal is discovered and tracked, and Spock surrenders himself to the Romulan officers, but they are too late to prevent Kirk from stealing the cloaking device and returning with it to the Enterprise .
The department said the device was misplaced at a FedEx shipping facility before it was located on Dec. 10, repackaged and sent back to the manufacturer. How the theory spread online.
Methods are typically based on implementing the theoretical techniques of transformation optics, which have given rise to several theories of cloaking. Currently, a practical cloaking device does not exist. [5] [6] A 2006 theoretical work predicts that the imperfections are minor, and metamaterials may make real-life "cloaking devices" practical.