Linked by Thom Holwerda on Mon 11th Jun 2007 14:09 UTC, submitted by Radarz
Geek stuff, sci-fi... A team from the Massachusetts Institute of Technology lit a 60 watt light bulb from a power source two meters away and with no physical connections between the source and the appliance. The 'WiTricity' device - the term coined by the MIT team to describe the wireless power phenomenon - uses magnetic fields to deliver power to the gadgets remotely."
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Perhaps it is actually...
by cefarix on Mon 11th Jun 2007 22:43 UTC
cefarix
Member since:
2006-03-18

... evanescent wave coupling rather than a transformer-type induction? That would prevent wastage of power when not charging.

Reply Score: 1

RE: Perhaps it is actually...
by big_gie on Tue 12th Jun 2007 01:04 in reply to "Perhaps it is actually..."
big_gie Member since:
2006-01-04

Maybe, but evanescent waves ranges are really low... So maybe something like a mouse charger.

Reply Parent Score: 1

cefarix Member since:
2006-03-18

Evanescent wave coupling requires that your transmitter and receiver be within one wavelength or thereabouts of the transmitted wave. The effect is that the waves start tunneling from the transmitter to the receiver. Outside this range, the coupling effect drops off exponentially. So if you have a few kilohertz frequency, you easily have a range of several meters.

Reply Parent Score: 1