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Re: witricity legality?
Quote:
Originally Posted by Alan Anderson
The odd/nifty/novel thing about what's being called WiTricity here is that it's strictly a "near field" thing. There is no traditional radiative field; as the Wikipedia quote says, it involves "evanescant waves" which fall off exponentially with distance.
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Alan - This is aimed at the Wikipedia article, not at you.
There ain't no such thing as a special kind of EM "wave" that is any more or less evanescent than any other in a vacuum.
In Earth's atmosphere, at some frequencies, EM fields are somewhat strongly affected by dust, moisture, ions, (buildings,) etc. At other frequencies, not so much.
But, as for any EM field being more more or less "evanescent" than any other field, and/or getting any other special exemption from Maxwell's equations - I don't think so. Over macroscopic distances all EM fields obey those equations.
Blake
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Blake Ross, For emailing me, in the verizon.net domain, I am blake
VRC Team Mentor, FTC volunteer, 5th Gear Developer, Husband, Father, Triangle Fraternity Alumnus (ky 76), U Ky BSEE, Tau Beta Pi, Eta Kappa Nu, Kentucky Colonel
Words/phrases  I avoid: basis, mitigate, leveraging, transitioning, impact (instead of affect/effect), facilitate, programmatic, problematic, issue (instead of problem), latency (instead of delay), dependency (instead of prerequisite), connectivity, usage & utilize (instead of use), downed, functionality, functional, power on, descore, alumni (instead of alumnus/alumna), the enterprise, methodology, nomenclature, form factor (instead of size or shape), competency, modality, provided(with), provision(ing), irregardless/irrespective, signage, colorized, pulsating, ideate
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And if in the end the students are inspired and more of the public becomes aware of the program, and people gain more appreciation for engineering, how can that not be a good thing? - dlavery [more] 
31-03-2008, 21:34
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