Groups > sci.physics.relativity > #472097

Re: Ectoplasm

From	Thomas Heger <ttt_heg@web.de>
Newsgroups	sci.physics.relativity
Subject	Re: Ectoplasm
Date	2018-09-16 20:23 +0200
Message-ID	<g07lc8Fib09U1@mid.individual.net> (permalink)
References	(2 earlier) <8AqlD.228320$kZ2.130313@fx09.am4> <pn5mq1$8dd$1@pcls7.std.com> <_vtlD.200456$8w.198688@fx40.am4> <pn688s$18o$2@pcls7.std.com> <g02fp9FgmqjU1@mid.individual.net>

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Am 14.09.2018 um 21:16 schrieb Thomas Heger:
> Am 10.09.2018 um 19:05 schrieb Michael Moroney:
>> Keith Stein <keithstein111@gmail.com> writes:
>>
>>> On 10/09/2018 13:07, Michael Moroney wrote:
>>
>>>> The only problem with that is that Maxwell's Equations just
>>>> come up with the speed of light = constant. Never constant
>>>> relative to anything, just the same constant everywhere.
>>>> Part of the motivation for Einstein's SR later, which raised
>>>> the speed of light=c to all inertial observers to a postulate.
>>
>>> Clearly you have never read Maxwell's "Treatise on Electricity
>>> and Magnetism", Michael. If you had you would surely know that
>>> Maxwell did NOT come up with the speed of light = constant, but
>>> rather a speed which depended on the electric permitivity and
>>> magnetic permeability OF THE MEDIUM. Not only did he NOT
>>> introduce the constants epsilon0 and mu0, but it is obvious
>>> that he would have reject such concepts, since the final
>>> chapter of his famous Treatise is headed "A MEDIUM NECESSARY".
>>
>> The modern Maxwell's Equations (modified by Heaviside, Hertz and others)
>> have two forms: an unwieldy form where you essentially have to account 
>> for
>> every single charge and current but applies to all situations, and a
>> simpler/integral form where materials of a bulk form have a displacement
>> field D replacing the electric field E, and the H magnetizing field
>> replacing the magnet field B. The difference between D and E is D 
>> contains
>> a permittivity of a material which is E_r*E_0, and H is B divided by the
>> magnetic permeability mu of the material, which is mu_r*mu_0.
>>
> 
> Maxwell had actually developed twenty quaternion formulas, before the 
> concept was changed by Heaviside.
> 
> Maxwell believed in some kind of aether, which behaved similar to a 
> perfect fluid.
> 


http://posner.library.cmu.edu/Posner/books/pages.cgi?call=537_M46T_1873_VOL._2&layout=vol0/part0/copy0&file=0263

(link from here: http://visualphysics.org/de/node/144)


I have found this pdf file, which is a good explanation of the subject.

http://www.hro-cigre.hr/downloads/12savjetovanje/E_&_M_Field_Variables-20_equations.pdf

btw: I would like to recommend so called 'bi-quaternions', also known as 
'complex four vectors'.

(Quaternions belong to the various subsets of these numbers)




There are a few experts in these numbers, like W.E. Baylis and Jonathan 
Scott.

I recommend the text of Jonathan Scott:

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.576.234&rep=rep1&type=pdf



TH

Thread

Ectoplasm xip1415926@gmail.com - 2018-09-08 09:37 -0700
  Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-10 09:51 +0100
    Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-10 10:12 +0100
      Re: Ectoplasm moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-09-10 12:07 +0000
        Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-10 13:32 +0100
          Re: Ectoplasm moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-09-10 17:05 +0000
            Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-10 18:42 +0100
              Re: Ectoplasm Odd Bodkin <bodkinodd@gmail.com> - 2018-09-10 17:53 +0000
                Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-10 19:16 +0100
                Re: Ectoplasm moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-09-10 18:27 +0000
                Re: Ectoplasm "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-09-10 12:23 -0700
                Re: Ectoplasm Odd Bodkin <bodkinodd@gmail.com> - 2018-09-10 19:27 +0000
                Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-11 08:16 +0100
                Re: Ectoplasm Odd Bodkin <bodkinodd@gmail.com> - 2018-09-11 11:52 +0000
                Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-11 14:54 +0100
                Re: Ectoplasm (Whoops! Typos eh!) Keith Stein <keithstein111@gmail.com> - 2018-09-11 16:00 +0100
                Re: Ectoplasm (Whoops! Typos eh!) xip1415926@gmail.com - 2018-09-11 08:27 -0700
                Re: Ectoplasm ( and Epistemology and Einstein's Nefarious Practices.) Keith Stein <keithstein111@gmail.com> - 2018-09-11 16:57 +0100
                Re: Ectoplasm Tom Roberts <tjroberts137@sbcglobal.net> - 2018-09-16 08:56 -0500
                Re: Ectoplasm xip1415926@gmail.com - 2018-09-16 12:48 -0700
                Re: Ectoplasm xip1415926@gmail.com - 2018-09-16 13:01 -0700
                Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-17 18:38 +0100
                Re: Ectoplasm moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-09-17 18:04 +0000
                Re: Ectoplasm Tom Roberts <tjroberts137@sbcglobal.net> - 2018-09-17 14:00 -0500
                Re: Ectoplasm "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-09-17 20:59 -0700
                Re: Ectoplasm "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-09-17 21:16 -0700
                Re: Ectoplasm "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-09-23 20:07 -0700
              Re: Ectoplasm moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-09-10 18:16 +0000
                Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-11 07:52 +0100
                Re: Ectoplasm moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-09-11 12:01 +0000
            Re: Ectoplasm Thomas Heger <ttt_heg@web.de> - 2018-09-14 21:16 +0200
              Re: Ectoplasm Thomas Heger <ttt_heg@web.de> - 2018-09-16 20:23 +0200
      Re: Ectoplasm xip1415926@gmail.com - 2018-09-10 07:03 -0700
      Re: Ectoplasm Tom Roberts <tjroberts137@sbcglobal.net> - 2018-09-10 09:39 -0500
        Re: Ectoplasm Keith Stein <keithstein111@gmail.com> - 2018-09-10 16:18 +0100
        Re: Ectoplasm Wilbur Foley <boue@eywffl.uf> - 2018-09-10 17:07 +0000
  Re: Ectoplasm (or History and Foundations of the LT) Keith Stein <keithstein111@gmail.com> - 2018-09-13 16:24 +0100
    Re: Ectoplasm (or History and Foundations of the LT) xip1415926@gmail.com - 2018-09-14 03:45 -0700

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