"Art Unwin" wrote in message
...
On Apr 16, 9:48 pm, Cecil Moore wrote:

I don't worry about it Cecil but I am concerned at the number of
people who consider themselves engineers. Remember that nobody on this
group has a true understanding of Maxwells equations! Nobody has
proved Maxwell's laws can be proved by adding a time varing field to
the Gaussian law of Statics. In fact, it is denied by ALL on this
group, Engineers?

yes art, electrical engineers, like me, do understand maxwell's equations.
and any of them worth their salt will explain, like i have done many times,
that it is unecessary to add an explicit time variable to the equations
because they are valid at every instant of time... so you end up with
f(t)=f(t) which is redundant and doesn't help with the solution of the
fields and waves. you have admitted that you don't know fields and waves
and that you are not an ee, yet you continue to try to put down those who
show a true understanding of the equations and their underlying assumptions.
you further demonstrate this by talking about lumped impedances in reference
to maxwell's equations and antennas. maxwell's equations describe fields
and waves, not the conductors and elements that generate them. they
reference the currents and fields, not the wires, capacitors, and inductors.
you can derive the properties of inductors and capacitors from maxwell's
equations, but you have to look deep inside them and apply the basic laws
that make up maxwell's equation to describe the lumped elements.

you have yet to explain where equilibrium is required in maxwell's
equations. by definition they rely on non-equilibrium conditions to set up
waves. you can't have a wave while you are in equilibrium, something has to
be putting energy into the system and something has to be moving, that
sounds like non-equilibrium to me.