How did Maxwell build his theory

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Discussion Overview

The discussion revolves around the historical development of Maxwell's theory of electromagnetism, focusing on how Maxwell formulated his equations, the context of existing knowledge at the time, and the challenges he faced. Participants seek references and insights into Maxwell's methodology and the evolution of his ideas.

Discussion Character

  • Exploratory
  • Technical explanation
  • Historical

Main Points Raised

  • One participant expresses admiration for Maxwell's theory and seeks references to understand how he developed his equations, emphasizing the historical context and the problems he aimed to solve.
  • Another participant claims that Maxwell primarily corrected one of the equations by introducing the displacement current and rederived existing equations.
  • A different viewpoint mentions that Maxwell initially had around twenty equations in various variables and later simplified them, possibly using quaternion formulation.
  • Several participants suggest various articles and books as resources for understanding Maxwell's work, with one cautioning against relying on Wikipedia due to potential inaccuracies.
  • One participant diverts the topic slightly to inquire about another member's unfinished paper, indicating a more personal or informal aspect of the discussion.

Areas of Agreement / Disagreement

The discussion contains multiple competing views regarding the specifics of Maxwell's contributions and the nature of his equations. There is no consensus on the details of his methodology or the best resources for understanding his work.

Contextual Notes

Participants highlight the complexity of Maxwell's original equations and the potential for misunderstanding in secondary sources. There is an acknowledgment of the historical context and the evolution of ideas, but specific assumptions and definitions remain unresolved.

lalbatros
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Without any doubt, Maxwell's theory of electromagnetism is the foundation of modern physics and relativity.
I am always impressed by how it is easy to learn, and conversly I am disappointed by my ignorance about how Maxwell did his job.

Would some of you know about a good reference describing how Maxwell designed his equations. What was known at the beginning, in which form, what were the problems to be solved, how they were solved and why they were solved the way Maxwell did.

It is always impressing for me to thing that electrostatics and magnetism led to a theory of light and to relativity. For me there is a kind of mystery there that can only be understood by going back in time.
 
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All Maxwell did was to correct one of the equations with the displacement current and rederive the equations (known before him) from scratch.

The wikipedia page gives good explanation with links to Maxwell papers:
http://en.wikipedia.org/wiki/Maxwell's_equations
 
He actually had some twenty equations in some twenty variables initially. I think he then re-cast it into a slightly simpler quaternion formulation (or he may have originally done it in that form).

This section on the Wikipedia Maxwell's Equations article may shed some further light. They link to his original treatise etc.
 
Suggest some good articles/books, plus avoiding the most massive thing often called..

A classic paper published (I think) in Science many years ago is just what you need: N. M. Wise, "The mutual embrace of electricity and magnetism", Science 203 (1979): 1310-1318.

See also Peter Michael Harmon, The Natural Philosophy of James Clerk Maxwell, Cambridge University Press, 2001.

On-line resources include www.lns.cornell.edu/spr/2005-02/msg0066934.html

I'd be very cautious about anything you read in the Wikipedia, however. Why, just the other day I became aware of a major mistake in another wikibiography... which I wrote! :blushing: (No, my mistake was certainly not intentional! For the record, while I have become disaffected from the Wikipedia after being one of the 500 most active members in 2006, as some PF members already know, I oppose Colbert-like "social experiments", aka vandalism.) I'd recommend that serious inquirers avoid the Wikipedia except perhaps to find references, but then you should stick with reliable secondary sources, e.g. printed books from respectable academic publishers such as CUP. (Breaking this rule was in fact what got me into trouble in the regretable episode which I just mentioned.)

Then there are primary sources such as The Scientific Letters and Papers of James Clerk Maxwell, P. M. Harman, Ed., 3 volumes, Cambridge University Press, 1990-2002.
 
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I hope the OP forgives me a quick off- topic question to Chris Hillman.

Chris Hillman why haven't you finished your "Categorical Primer" paper??
 

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