"Szczepan Bialek" wrote in message
...

"Art Unwin" wrote
...
On Jun 1, 2:39 am, Szczepan Bia³ek wrote:

"1861 - Maxwell publishes a mechanical model of the electromagnetic
field.
Magnetic fields correspond to rotating vortices with idle wheels between
them and electric fields correspond to elastic displacements, hence
displacement currents. The equation for now becomes , where is the total
current, conduction plus displacement, and is conserved: . This addition
completes Maxwell's equations and it is now easy for him to derive the
wave
equation exactly as done in our textbooks on electromagnetism and to note
that the speed of wave propagation was close to the measured speed of
light.
Maxwell writes, ``We can scarcely avoid the inference that light in the
transverse undulations of the same medium which is the cause of electric
and
magnetic phenomena.'' Thomson, on the other hand, says of the
displacement
current, ``(it is a) curious and ingenious, but not wholly tenable
hypothesis.''

"1864 - Maxwell reads a memoir before the Royal Society in which the
mechanical model is stripped away and just the equations remain. He also
discusses the vector and scalar potentials, using the Coulomb gauge. He
attributes physical significance to both of these potentials. He wants to
present the predictions of his theory on the subjects of reflection and
refraction, but the requirements of his mechanical model keep him from
finding the correct boundary conditions, so he never does this
calculation."
From:http://maxwell.byu.edu/~spencerr/phys442/node4.html

Try understand: "the mechanical model is stripped away and just the
equations remain."

Now engineers are using model with compressible, massive electrons. The
equations are used by teacher to teach the math.

According to Maxwell model the radio waves are transversal. Are such in
your
radio reality?

S*

Hi S,
Interesting to read what you say as there are many similarities to my
antenna work.

Yes. But I do not try to work out a new theory. For me the 200 years old
"acoustic analogy" is enough.

A small addition with respect to light formation. Displacement current

Displacement current is necessary in the model with electricity in form of
the incompressible fluid. Incompressible fluid is a history.

is the action required of three dimensional equilibrium which is why I
often point to the helicopter as an example,
same thing goes for a gyroscope or the Sedgway scooter. It is this
circular motion that holds to the understanding of light since this
provides the spin of a particle such that it has straight line
trajectory.

Straight line trajectory is normal phnomenon at the high frequences. The
ultrasonic waves are like radii (see sonar)

The frequency of circular motion is what changes when the
particle enters a medium that is resistive where the spin increases to
maintain
the straight line projection. The energy for this increase in spin is
the latent energy that is removed from
the particles potential energy similar to latent heat with liquids.
Thus energy is conserved by the increase in spin which is analogous to
change in frequency!
This change in frequency brings the particle into the area of color ,
light and X rays ie higher frequencies and the latent energy shows up
as light until there is no more energy left and the particle has
vaporized such that light progresses to invisiblity. This being
similar to the effects shown of a meteorite as it comes into contact
with the resistive environment of Earth.

Each new theory is very difficult for me. I prefer descriptions of
experiments and observations.


With respect to radiation from the ends of a radiator. This can only
happen when the radiator is a fraction of a wavelength when the law of
equilibrium is violated. The accellaration of charge at the end is
without spin applied and tho there is radiation it becomes non
directional and unable to overcome the gravitational force and falls
within a short distance.

Try the acoustic analogy. Here the all is easy. Quite opposite as in the
Maxwell model: "He wants to
present the predictions of his theory on the subjects of reflection and
refraction, but the requirements of his mechanical model keep him from
finding the correct boundary conditions, so he never does this
calculation".

The only reason for Maxwell model is the light polarisation. In his era
the polarisation was explained with transverse waves. Now we know (from
Clark) that the apparatus is polarised not waves.
Regards,
S*



i knew getting you and art together would be interesting... good for a whole
evening full of laughs! the waves must be polarized to interact as observed
with polarized antennas.