exploits


A few weeks ago, we wrote something about an invisible clothing, created in Japan. Invisible was over-exaggerated, since you had to look through a lens ... to see nothing!

Anyway, the real invisible clothing is coming soon:
John Pendry, David Smith et David Schurig, a beautiful group of English and American scientists, have established a theorical and mathematical model describing a device of invisibility.

How does it work? Look at the photograph here on the left. The invisibility would be created by a distortion of the rays of light. Their trajectory is curved in order to circumvent the object to be masked. The rays then take, behind the object, the trajectory which they would have had if the object had not been there.

We could also make an analogy with the river and an obstacle: water circumvents the obstacle and the current takes its initial shape just afterwards. Except that, in our case, water is electromagnetic waves (the light), and the obstacle is the invisible object.

Thus, this object should be covered with a material which could deviate the electromagnetic waves in this way. Paper describes this object as being a sphere or a cylinder coated with a sheath having this property. It is very theoretical and yet, a demonstration is foreseen at the end of 2007.

And guess who is interested the most by this (potential) future invention?
Exactly .. as usual ... the famous DARPA.

source: stuff, one month ago.
for those who do not know: Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength.Due to the wave-particle duality of matter, light simultaneously exhibits properties of both waves and particles. The precise nature of light is one of the key questions of modern physics. To be continued on wikipedia.