From: Art Chakalis (achakali@gcfn.org)
Date: 12/12/01-10:05:14 AM Z
Sorry, but don't go here . . . these are constructs in theoretical physics
. . . if and when we cross into a universe that is one and/or two
dimensional, pull them out of your back pocket to use. That is if we
still have a back pockets . . . which is an interesting question unto
itself but it would be off-topic for alt-photo.
Sincerely, Art
On Wed, 12 Dec 2001, Richard Koolish wrote:
> I'm going to point you to some rather mathematical web pages that explain
> the electric field from point, line and plane sources. The bottom line is
> that a point source is 1 over R squared, a line source is 1 over R and
> a plane source is constant. The text below the URLs are quotes from the
> web pages, not my comments.
>
> Note that in the real world, a fluorescent tube is not an infinite line and
> a light bank is not an infinite plane, but can act like them if you are close
> enough. If you move far away, the behavior changes.
>
>
>
> Point source:
>
> http://musr.physics.ubc.ca/~jess/hr/skept/Gauss/node1.html
>
> "The flux from an isotropic source points away from the centre and falls
> off proportional to the inverse square of the distance from the source."
>
>
> Line source:
>
> http://musr.physics.ubc.ca/~jess/hr/skept/Gauss/node5.html
>
> "The electric field from a cylindrically symmetric charge distribution
> points away from the central line and falls off proportional to the inverse
> of the distance from the centre."
>
>
> Plane source:
>
> http://musr.physics.ubc.ca/~jess/hr/skept/Gauss/node6.html
>
> "Note the interesting trend: a zero-dimensional distribution (a point)
> produces a field that drops off as r-2, while a one-dimensional
> distribution (a line) produces a field that drops off as r-1. We have to
> be tempted to see if a two-dimensional distribution (a plane) will give us
> a field that drops off as r0 -- i.e. which does not drop off at all with
> the distance from the plane, but remains constant throughout space. This
> application of GAUSS' LAW is a straightforward analogy to the other two,
> and can be worked out easily by the reader. ;-)"
Art Chakalis
Columbus, Ohio, USA
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