Natural Science Forum / Physics / Electromagnetism / September 2004

Following a review of several electromagnetics texts and related
information around the Web I've found two common definitions of
electric flux. According to Kraus, "The electric flux psi through a
surface area is the integral of the normal component of the electric

Some more things to consider about the excessive exposure to
electromagnetic radiation suffered by almost everyone today. The
brains of fetuses, infants and young children are going to be more
susceptible to the effects of exposure due to their brains not being

Some more things to consider about the excessive exposure to
electromagnetic radiation suffered by almost everyone today. The
brains of fetuses, infants and young children are going to be more
susceptible to the effects of exposure due to their brains not being

I was given this problem to think about from my professor.  It's not for any
class.
Imagine there is some magnetic field in empty space (tightly-packed lines
curling around in a circle) at t=0.  What happens to the field as t ->

I have to admit that this post of mine was in part
stimulated by reading the recent long debates between
Y.Porat and Bjoern Feuerbacher. OTOH, even if I'm a
chemist, I've always been attracted by some branches

I have a ferrite dilemma:
On one hand, ferrites are effective absorbers of microwaves in EMI
applications. On the other hand they are used in devices such as
circulators and isolators to direct microwaves due to non-reciprocal

It's being reported that nanotubes can act as antennae for visible
light, sort of like a radio antenna does for longer wavelengths:
http://www.aip.org/pnu/2004/split/701-1.html
Is this a new way to harvest solar energy? A new way to overcome the

The spheres of light formed in the phenomenon of ball lightning can
have an
energy output of about the same energy density as dark energy has in
the universe.Do lightning storms compress dark energy and raise its

hi!
In the case of dilelectric permittivity is a measure of the extent to
which
polar molecules are distorted from their stable position. But in case

I would much appreciate any informed response to the following:
A small ferromagnetic sample is placed close to a magnet.
Energy is supplied to the sample incrementally by pushing it closer
to the magnet. At a point A the sample is pulled to the magnet

Cosmic Radio Signals can be  polarized at 91mhz (fm); 160mhz (vhf); 610
mhz ( on channel 78uhf-tv) by keying a cb microphone over a radio receiver set
on these radio channels with your home equipment.
These are known cosmic radio sources from outerspace from

In order to test a (precise and very fast) library of transcendental
functions, together with a graphical interface for real-time analysis,
selected functions are being made available to the public for critique.
Currently you may enjoy the marvels of the:

does anyone know how to build an EMF generator that has a controllable
frequency, or know how to work out the frequency of electromagentic
fields from the voltage and current, and maybe, the turns of wire of
an electromagnet??

Dear Colleagues,
We published a new study which considerably improves the basic idea of
electromagnetic induction. You can find this material in our e-journal
SELF Transactions, volume 4 (2004), paper

Does any one have a result of experimental verification of electromagnetic
mass?
Since the existence of electromagnetic mass means a non-zero size of all
charged particles, then it must give the radius of charged particles. So