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Scientists: light behaves strangely on metal foil

April 5 2007
13:49

Scientists from the University of Utah sent rays of light on metal foils, at various points on a specific scheme were pierced by small round holes, and marveled: light passing through this structure similar to the current fluid - all over, "until the last drop."

Pakoe behavior is strange for the world. If you look at the world through an ordinary kitchen colander, then we can see that some of the rays passes through the holes, but most still delayed.

The experiments showed that terahertz radiation (it occupies the space between the infrared and microwave range) safely passes through the thin sheet metal punctured completely. Researchers of this strange phenomenon is called a T-ray radiation.

"100-percent light penetration occurs even if the holes are only 20% of the square metal plate" - says one of the experimenters - a physicist Ajay Nahata. How is this possible, scientists around the world can not solve until now. So far in 1998-m in their study, Thomas Ebbesen showed that the amount of visible light passing through a single hole, more than expected.

Since then, researchers have concluded that the developed Ebbesonom theory holds true in the case of regular (periodic) arrangement of holes. But Nahata and the Varden have shown that light travels in the same way and through the plate with openings at irregular positions.

In addition, Nahata and Varden first investigated as through a hole in the metal foil is a low-frequency terahertz radiation. "Using terahertz range is allowed to see how and when the radiation passes through the slot: the part is at once a part - a little later," - says Daniel Mittlmen, an electrical engineer working in the T-lab at Rice University.

Since all light waves behave in similar ways, we can assume that such behavior is characteristic of the entire electromagnetic spectrum. Reports membrane.

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