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The Ghost of Tesla: MIT researchers demonstrate wireless electrical power transfer
- mynameishere 19y agoSnore. Basic fact checking 101 (for MIT!): http://www.google.com/search?q=microwave+power+transfer http://www.google.com/search?q=microwave+power+transfer http://en.wikipedia.org/wiki/Microwave_power_transmission http://en.wikipedia.org/wiki/Microwave_power_transmission
- DaniFong 19y agoThis is a non-radiative method: in the absence of a receiving device with a correctly tuned inductance, in the field surrounding the emitter there will be no, or hardly any E x B field. In other words, there would be no, or hardly any energy leaving the emitter. Most interestingly, the method they describe can be used in a unidirectional manner, and the power supplied would fall off much less quickly than 1/r^2. One could even put a switch on the receiving circuit. When the circuit is broken, the total energy expended by the emitter would zip down to zero passively, without any control required. In fact, it's a fairly straightforward game to construct one of these on one's own. Too bad I didn't think of it ;-)
- sosuke 19y agoNot to downplay the accomplishment but I was fairly surprised that the article represented the idea as entirely unique without ever actually mentioning Tesla. "WiTricity is rooted in such well-known laws of physics that it makes one wonder why no one thought of it before."
- DaniFong 19y agoThe concept of sending electricity wirelessly has been imagined, but nobody had come up with a decent way to avoid the losses except by using an actively controlled beam method. It's pretty darned innovative.
- zandorg 19y agoDo they use this in nature?