06-08-2007, 12:14 AM #1
MIT team claims wireless power demo By BRIAN BERGSTEIN, AP Technology Writer
Thu Jun 7, 6:04 PM ET
BOSTON - Massachusetts Institute of Technology researchers made a 60-watt light bulb glow by sending it energy wirelessly — from a device 7 feet away — potentially heralding a future in which cell phones and other gadgets get juice without having to be plugged in. The breakthrough, disclosed Thursday in Science Express, the online publication of the journal Science, is being called "WiTricity" by the scientists.
The concept of sending power wirelessly isn't new, but its wide-scale use has been dismissed as inefficient because electromagnetic energy generated by the charging device would radiate in all directions.
One advance was announced last fall, when MIT physics professor Marin Soljacic said he had figured out how to use specially tuned waves. The key is to get the recharging device and the gadget that needs power to resonate at the same frequency — allowing them to efficiently exchange energy.
It's similar to how an opera star can break a wine glass that happens to resonate at the same frequency as her voice. In fact, the concept is so basic in physics that inventor Nikola Tesla sought a century ago to build a huge tower on Long Island that would wirelessly beam power along with communications.
The truly new step, which is what was described in the paper in Science, was that the MIT team carried the concept out. The scientists were able to light up a 60-watt bulb that had "no physical connection" with the power-generating appliance. "It was quite exciting," Soljacic said. The process is "very reproducible," he added. "We can just go to the lab and do it whenever we want."
06-08-2007, 12:23 AM #2
Oh my gosh. I didn't even know this was on the horizon.
06-11-2007, 10:38 PM #3Former Member
- Join Date
- Mar 2005
- NSW Australia
Thats amazing, we are already in the future- lol
06-11-2007, 11:10 PM #4Former Member
- Join Date
- Aug 2003
Holy cow! Who knew? What a wonderful world we live in.