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Re: Are the field lines the trajectory of a particle with mass M? [message #38556 is a reply to message #38554]

Mon, 15 March 2004 14:45

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Surendar Jeyadev wrote:
>
> In article <405481EF.6359E0DA@saicmodis.com>,
> James Kuyper <kuyper@saicmodis.com> wrote:
...
> G. K. Batchelor. There are three kinds of lines you need to worry about.
>
> 1. Streamline: A line whose tangent is everywhere parallel to the
...
> 2. The Path Line (or simply Path): This is just the path traced by a
...
> 3. The Streak Line: The line along which lie all those fluid elements

I should have specified that I was talking about steady-state fluid
flow. I was trying to point out one case where field-line and trajectory
were the same thing, before explaining why that's not true in general.

...
> Electrodyanmics should have some coverage. These problems are much more
> fun when relativity comes in :-)

Especially when you throw in general relativity in strong gravitational
and electrical fields. :-) Geons are a particularly extreme example: a
ball made up entirely of photons which are moving in circles because,
and only because, of their mutual gravitational attraction.

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[Message index]

		Re: Are the field lines the trajectory of a particle with mass M? By: profxtjb on Mon, 15 March 2004 20:40
		Re: Are the field lines the trajectory of a particle with mass M? By: James Kuyper on Mon, 15 March 2004 14:45
		Re: Are the field lines the trajectory of a particle with mass M? By: jeyadev on Mon, 15 March 2004 14:04
		Re: Are the field lines the trajectory of a particle with mass M? By: R.G. Stockwell on Sun, 14 March 2004 09:40
		Re: Are the field lines the trajectory of a particle with mass M? By: James Kuyper on Sun, 14 March 2004 08:01

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