Check out this article at ECNmag.com which discusses a new technology of controlling circuits with light. In 2005 scientists had theorized that a light could use repulsive and attractive forces to control a switch, but at that time they had only proven the repulsive power. On July 13th they announced that they had solved the problem.
"This completes the picture," Tang said. "We've shown that this is indeed a bipolar light force with both an attractive and repulsive component."
So what does this mean? The article mentions two important uses. There's little to no resistance in this technology, so the loss of power to use devices practically disappears. This could mean devices like your TV or computer will take up less power and people will leave less of a carbon footprint without changing their lives. The second use that was mentions was the telecommunication companies won't need nearly as much cable to move information. Maybe this means AT&T can make a working 3G network and possibly provide some customer service here and there.
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