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A Student's Guide to Maxwell's Equations
Posted on Tuesday, February 17, 2009 @ 21:17:45 EST by vlad


I (Vlad) also heard the story about Dr. Fleisch and Mr. Cuhaci (the Amazon customer in Ottawa) on the CBC's radio program "As It Happens". I was very impressed by Dr. Fleisch's action (on the Christmas day) and decided to check the book. It is a 5 star book and here are some extracts from the published customer reviews (random):
"Amazing Author, Amazingly useful book. A man who is so confident in his product he will fly to your door on Christmas Eve to make sure you have it. Beat that..."
"See the Forest Through the Trees. This is the best overview of Maxwell's equations I have ever come across. I cannot praise it enough for it's brilliant clarity..."
"A fantastic book  a MUST get for anyone starting E&M. Forget the textbook. Forget the lecture notes. Read this book..." "Epiphany of clarity! Maxwell's equations represent a comprehensive and descriptive
condensation of (once believed to be disparate) electromagnetic
phenomena, into a gloriously concise set of selfconsistent (albeit
arcane) mathematical statements. Daniel Fleisch has lucidly crafted
explanations both of Maxwell's equations that describe EM phenomena,
while simultaneously employing the latter to motivate, justify, and
describe the vector calculus of the former with great claritythe
perfect synthesis..."
"UPDATED (Feb 2 and Feb 10,09): I received a new copy from the author himself on Christmas Day, hand delivered (for more info please read followup comments to this review). The book is excellent, very clear and easy to follow. My rating of 1 star (based on the first book I received, since I could not read the full content of the misprinted issue) now could be changed to 5 star. However, if I change it to 5 star, most review readers could miss the "happy ending" (read followup comments), and the Author's concern and excellent service on a winter stormy day... (By the way, I did not ask for a refund from Amazon since the author gave me a new copy the next day). MikeC/Ottawa"

 
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A new connection between electricity and magnetism (Score: 1) by vlad on Tuesday, February 17, 2009 @ 21:28:05 EST (User Info  Send a Message) http://www.zpenergy.com  Robert McMichael and Mark Stiles Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 208996202
Published February 9, 2009
A magnetic domain wall moving along a ferromagnetic wire can generate a voltage across the wire. This electromotive force, which is not the same as Faraday’s law of induction, is part of a growing family of interactions that are being discovered in the field of spintronics.
More: http://physics.aps.org/articles/v2/11 [physics.aps.org]



Re: A Student's Guide to Maxwell's Equations (Score: 1) by Koen on Tuesday, March 03, 2009 @ 00:59:04 EST (User Info  Send a Message) http://no.nl/tesla  This is only the beginning to the strange world of electromagnetism. Maxwell's equations also close doors to a new frontier of exploration. It contains a Lorenz condition for which there is no experimental proof. It ignores the many different force/potentials laws prior to the development of field laws. The older work by Gauss, Weber, Ampère sometimes describes phenomena that are not covered by Maxwell's equations. Tesla's work on longitudinal electric waves is ignored, because Maxwell's work is overvalued.
The Lorenz gauge relation leads to the derivation of the "retarded potentials" that satisfy this relation, and that are also essential for the relativistic forms of Maxwell's field theory, because the retarted (noninstantaneous) potentials . spread with speed "c". This was concluded without the slightest bit of experimental evidence.
As a student I also struggled with the underlying mathematics (function analysis, vector notation, many theorems), and I also wondered why the electromagnetic potentials (for instance the Coulomb potential), should have speed 'c' in vacuum. Only electromagnetic waves have average speed of c, but electromagnetic potentials are not necessarily transversal electromagnetic waves.
Also for Zero Point Energy the limited world of Maxwell's theory (for instance the Stochastic ElectroDynamics theory is based on Maxwell's TEM waves) results into a limited notion of ZPE, and therefore how to design devices that convert ZPE into useful energy forms.

Maxwell and the Lorenz Gauge (Score: 1) by FDT on Saturday, March 14, 2009 @ 13:28:50 EDT (User Info  Send a Message)  Koen, I'm not quite sure whether you are criticizing or hailing the Lorenz gauge here. I incline more to the view that you are criticizing it. Maxwell himself was appalled at the Lorenz gauge when it first came to his attention. I'm also totally opposed to the Lorenz gauge because it introduces the speed of light into Gauss's law, and there is absolutely no basis whatsoever for doing that. When Maxwell derived the EM wave equation in his 1865 paper, he eliminated the Gauss's law term. The speed of light only applies to the rotational aspect of the magnetic field. That means that light is a propagation of angular accelerations in Maxwell's molecular vortices. The speed of light therefore relates to the rotational speed of the vortices and not to pressure in the aether, even though pressure in the aether will undoubtedly be involved in the propagation mechanism. see,
http://www.wbabin.net/science/tombe53.pdf [www.wbabin.net] Yours sincerely, David Tombe 
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