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Magical potions can be consumed to grant temporary or permanent invisibility. Magic spells can be cast on people or objects, usually giving temporary invisibility. Some mythical creatures can make themselves invisible at will, such as in some tales in which leprechauns or Chinese dragons can shrink so much that humans cannot see them.
Invisibility in fiction is a common plot device in stories, plays, films, animated works, video games, and other media, found in both the fantasy and science fiction genres. In fantasy, invisibility is often invoked and dismissed at will by a person, with a magic spell or potion, or a cloak, ring or other object.
To make an object literally vanish before a person's eyes, a cloak would have to simultaneously interact with all of the wavelengths, or colors, that make up light. On the other hand, a group of researchers connected with Berkeley Lab and the University of California, Berkeley believe that cloaking at optical frequencies is indeed possible.
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 ...
Scientists in China have created a new camouflaging material that changes colour in response to its surroundings, an advance they say may help develop clothing to make one “effectively invisible”.
An operational, non-fictional cloaking device might be an extension of the basic technologies used by stealth aircraft, such as radar-absorbing dark paint, optical camouflage, cooling the outer surface to minimize electromagnetic emissions (usually infrared), or other techniques to minimize other EM emissions, and to minimize particle emissions from the object.
Tarafdar sent the macaw to infiltrate Shonku's household and collect the invisibility potion's formula. Thinking that the macaw can betray him in the future, and also to suppress his secrets which the macaw knows, Tarafdar tried to kill the bird, after successfully turning himself invisible. The macaw drank Tarafdar's potion, thus saving itself.
Rochester Cloak is a cloaking device which can be built using inexpensive, everyday materials. John Howell, a professor of physics at the University of Rochester, and graduate student Joseph Choi developed the device, which features four standard lenses that allows an object to appear invisible as the viewer moves several degrees away from the optimal viewing positions.