Making things invisible is now a possibility
2008-07-03 17:00:15 (GMT) (Caymanmama.com - News)Fresno, California (CaymanMama.com) — CNN reported that becoming invisible like Harry Potter and futuristic Star Trek creatures is no longer an impossibility in the scientific world. Scientists all over the world are making progress with experiments and theories regarding making anything invisible.
A mathematician at Utah University, Graeme Milton, says that theoretically, an object can be made invisible by using a super lens. Along with other collaborators based in Australia including Lindsay Botten, Ross McPhedran and Nicolae Nicorovici, he has shown that from a distance, objects seen through a super lens may seem to disappear.
The refractive index of a super lens is negative which means that when light hits it, it gets reversed back and sent to the opposite direction. John Pendry, a physicist at the Imperial College of London, was one of the first people to propose super lens during 2000. At present, Milton said that he cannot claim it to be effective for as large an object as a human being but it can surely make small dust clusters invisible.
David Huse, the physics professor at Princeton University, said that the science involved in making things invisible using this technique is quite legitimate, but he is not sure whether the lens will also be invisible. In response to this, Milton said that a super lens is able to correspond with the space that is folded back upon it which means that it will also be invisible. Practically, a very thin silver or gold may approximate this effect. The experimentalists are also progressing in the research of cloaking by making use of artificially structured things known as meta-materials.
Smith said that in communications, the device can be used for cloaking antennas from each other if they are interfering with one another. Obstructions in cell phones’ reception can also be cloaked, thus allowing the signals to pass through. He even seems to be optimistic about making army trucks invisible using these techniques.
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