"news.tiscali" <news_at_tiscali.it.nospam> ha scritto nel messaggio
news:4ad86f0f$0$1418$4fafbaef_at_reader4.news.tin.it...
> ti sei spiegato. E quello che ho visto a Leonardo.
> Un apparecchio che imprigiona la luce solare, e la trasforma
> in corrente elettrica. Ma di quanti volt/ampere?
> Questo non lo hanno detto!
>
> Ciao
>
Ho trovato quest'articolo:
Ayinde O. Chase - AHN Editor
Nanjing, China (AHN) - Researchers for the first time have created an
artificial electromagnetic "black hole" based on theories published earlier
this year. The device created by two Chinese scientists works at microwave
frequencies and has the ability to suck in surrounding light.
Evgenii Narimanov and Alexander Kildishev of Purdue University in West
Lafayette, Indiana proposed their plans for a table-top black hole to trap
light was proposed in a 2009 paper. Their theoretical design included
mimicking the properties of a cosmological black hole, whose intense gravity
bends the surrounding space-time, causing any nearby matter or radiation to
follow the warped space-time and spiral inwards.
Scientists, Tie Jun Cui and Qiang Cheng at the Southeast University in
Nanjing, China, used Narimanov and Kildishev's theories and transformed them
into reality. They recently built a "black hole" for microwave frequencies.
The device consists of 60 layers of circuit board arranged in concentric
rings. The layers are coated in copper and etched with intricate patterns
that interact with light waves at microwave frequency. According to
published reports scientists have used these "meta-materials" and strips in
the past to make invisibility cloaks.
It is the hope of researchers that this novel device will soon graduate to
actually trapping visible light. If this leap can be made researchers hope
that it will shed light on an entirely new way of harvesting solar energy to
generate electricity.
Read more:
http://www.allheadlinenews.com/articles/7016700405?Chinese%20Scientists%20Create%20First-Ever%20Artificial%20Black%20Hole#ixzz0UC5lNdCp
Received on Sat Oct 17 2009 - 14:05:42 CEST