Through the fog: again about invisibility
Falling snow or fog flashes from us a picture, because the light is scattered in all directions. Only some of it makes his way through the veil. But theoretical studies show that there is always the possibility of "fooling" light rays so that they pass through such disordered material, and it doesn’t matter how dense. Now these calculations were confirmed experimentally.
It is known that the light is an electromagnetic wave, moving in space, indignation of electromagnetic fields – about so ripples runs on the surface of the lake. When such a wave enters into interaction with disordered material, which has a plurality of reflective surfaces, it bounces on it in a variety of different directions – dissipates. Only some pass through ", but the thicker layer of the material, the less such luckyrs.
However, there exists the theorists described by theorists to change the shape of the light wave, in a special way "bend" it so that it enters into interference itself. At the same time, the reflected waves interact with still falling – and mutually enhanced until the translucent obstacle is penetrated. Back in the 1980s, it was shown that theoretically, in any obstacle, there is an "open channel" for the passage of light – no matter how the thickness of the disordered material increases, the tunnel decreases in it, but never disappears completely. So – in his end there is light.
These speculative experiments found confirmation only recently, in the work of the Netherlands Physicists of Allard Moska (Alland Mosk) and IVO Wellwork (IVO Vellekoop). For this, scientists focused a laser bundle on a translucent zinc oxide granules, and the camera installed on the other side of the obstacle fixed the light passed through it. Using feedback, they adjusted the characteristics of the falling light using a liquid crystal, through which he passed and which allowed them to delay the desired wave sections. Variating different parameters, scientists have achieved a major result – up to 44% of the original wave passed through the obstacle. And even by increasing the thickness of the translucent layer halved, from 5.7 to 11.3 microns, they managed to achieve the same effect. Extrapplying its results, physics declare that theoretically it is possible to achieve a 66 percent passage of light.
We will wait for new discoveries, especially since the potential of this find is huge. It can be used in medicine and biology, and even improve mobile phones.
Read more about findings in the field of invisibility, read: "Theoretically, I do not see".