Re: Zap!
- From: "Bob Myers" <nospamplease@xxxxxxxxxxxxxxx>
- Date: Thu, 30 Apr 2009 11:18:44 -0600
Datesfat Chicks wrote:
"Bob Myers" <nospamplease@xxxxxxxxxxxxxxx> wrote in message
news:gtckgg$42e$1@xxxxxxxxxxxxxxxxxxxxxx
.p.jm.@xxxxxxxxxxxxxxxxxxxxxxxxxx wrote:
While Gauss' original experiments were with static electricity,
the expression of Gauss' law for electric fields as expressed
by Maxwell is not limited to electrostatics. You get inside
a closed conducting surface, and you will NOT experience
electric or EM fields generated by external sources.
At ALL points within, or just 'exact dead center' ? IOW, are
there fields that are cancelling in polarity ?
It's somewhat counter-intuitive until you look rather closely
at what's going on, but it's all points within.
In other words, if you're inside a conductive shell - imagine
that you're sitting inside a big copper ball, for example -
there's NOTHING going on inside, in terms of EM, that
comes from an outside source.
Did you mean to say EM? I thought there would be no E-fields but
M-fields were still there?
No E-fields, and therefore no electromagnetic waves, so
yes, there can be no EM. You can't have an EM wave
without the electric field component. There's a significant
difference between electromagnetic waves and independent
E- and M-fields.
Bob M.
.
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