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June 8, 2007
Light Bulb Powered Wirelessly From 7 Feet Away
Topics: General Science
[Image: A 60-watt light bulb being lit from two meters away without an obstruction (Science Magazine via Fox News)]
Power-up cell phones, laptops, MP3 players, household robots and other electronics without wires or batteries? No problem, just use "WiTricity":
Using magnetically coupled resonators, a team of MIT students and professors have successfully tested their newly developed system for wireless electricity. The concept has been around for a while and even practiced using different transfer methods such as radio waves and lasers. The problem, however with radio waves is that there is no control of dispersion, which emits wasted energy into the atmosphere, and the problem with lasers is that there needs to be an uninterrupted line of sight (not to mention that lasers can be dangerous).More here ...The team from MIT, led by professor Marin Soljacic, was able to power a 60W bulb without any physical connection between the bulb and the power source. This works by having two electromagnetic resonators, in the form of copper coils that share the same frequency. The resonators are placed within a relative proximity of each other, and the source resonator, also called the sending unit, can then transmit energy to the detached resonator across their shared frequency and not interfere with objects of differing frequencies.
Related: Witricity - cue cancer conspiracy...wait for it...wait....now
Hat tip - Harry Owens
Posted by Richard at June 8, 2007 6:25 PM
How exactly does this differ from Nikoli Tesla's experiments? Near as I can tell the only difference is using a directional antenna.
Posted by: Rorschach at June 10, 2007 11:55 PM
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- Light Bulb Powered Wirelessly From 7 Feet Away - Jun 08, 2007
