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Physics promises wireless power
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Written by aghastpumpkin   
Wednesday, 15 November 2006 12:24
Read the full story at The BBC News:

'Boffins from the USA are now saying they know exactly how to transmit power wirelessly, eliminating the need for power cables.

"Although the team has not built and tested a system, computer models and mathematics suggest it will work.

"There are so many autonomous devices such as cell phones and laptops that have emerged in the last few years," said Assistant Professor Marin Soljacic from the Massachusetts Institute of Technology and one of the researchers behind the work.

"We started thinking, 'it would be really convenient if you didn't have to recharge these things'.

"And because we're physicists we asked, 'what kind of physical phenomenon can we use to do this wireless energy transfer?'."

How wireless energy could work

The answer the team came up with was "resonance", a phenomenon that causes an object to vibrate when energy of a certain frequency is applied.

This would work in a room let's say but you could adapt it to work in a factory
Marin Soljacic.

"When you have two resonant objects of the same frequency they tend to couple very strongly," Professor Soljacic told the BBC News website." '

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