The visible light by the human ones has a wavelength ranging between 400 nanometers armani
November 26th 2010 -
The visible light by the human ones has a wavelength ranging between 400 nanometers (purple and indigo) and 700 nanometers (dark red).
620 nanometers corresponds to the limit between orange and the red, which means that object painted uniformly in this colour would escape the glance completely.
Prototypes able to take up this challenge were already designed but only on plane surfaces and hard armani, unsuitable with the clothes industry of clothing for example.
Physicists Scot announced Thursday to have designed a flexible material able to act on the visible light by the human eye, first stage towards the cape of expensive invisibility in Harry Potter and the amateurs of science fiction.
These materials able to push back the light already exist but function only with wavelengths much larger than the visible light (waves radar or infra-red). For the spectrum perceived by the human eye hats, the challenge is more complex: its wavelength being much shorter, it becomes “invisible” only with the metamateriaux ones with the structure it also much smaller.
However the light naturally tends to move straight. And so that the light waves carry on their road without disturbance around this object – which would be found thus hidden with the glances, under all the angles of vision – it is necessary to resort to materials which remain to be invented, the “metamateriaux ones”.
“The metamateriaux ones constitute the supreme means to act on the behavior of the light” german, ensures Mr. Di Falco.
To make an object invisible supposes that it does not absorb the light but on the contrary which it “runs” and diffuses all around him colibri, as the current of a torrent is reformed after having met a rock.
So the new metamateriaux ones proved to be able to act on the light for other colors of the visible spectrum, one could then arrive to this famous “cape of invisibility” by superimposing the various membranes, estimate the researchers Scot, who publish off their lucky find in New Journal Physics.
The researchers Scot of Universite of St Andrews, directed by Andrea di Falco, as for them developed their new material using a polymer available in the trade and a silicon support. Result: the “Metaflex” is sufficiently flexible to be placed on an ordinary contact lens d&g, and this membrane is able to interact with a light a wavelength of approximately 620 nanometers.
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