Re: electric field along an electromagnetic ray

On May 21, 5:45 pm, "Androcles" <Headmas...@xxxxxxxxxxxxxxxx> wrote:
"Robert Hubbard" <roberthubba...@xxxxxxxxx> wrote in message

news:8d7bb5f1-78c4-4fb3-9e82-09785176b9e1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On May 21, 12:40 pm, "Androcles" <Headmas...@xxxxxxxxxxxxxxxx> wrote:

The electric field is ONE component of an electromagneticray.
The other component is the magnetic field, at right-angles to the
electric field and phase-shifted in time by 90 degrees (or pi/2).

| Actually the electric and magnetic fields of a photon are in phase.

Actually in fact if both were zero simultaneously you'd be creating and
destroying
energy.

| Perhaps you are thinking of an LC tuned circuit, where the magnetic
| field of the inductor and the electric field of the capacitor are
| phase-shifted by 90 degrees.

Actually in fact they certainly are and that is the correct model for a
photon
or a radio wave. Actually in fact the current is in phase with the magnetic
field.

| Maxwell's Equations have the gory details.

Actually in fact Maxwell believed in aether, where the energy could be
stored in the "springiness" of a material substance. Actually in fact there
is no aether, Maxwell was wrong.
Actually in fact Maxwell's equations are not Maxwell's, they are Faraday's,
Gauss's and Ampere's.
Actually in fact one term in one equation of Maxwell's equation
totally belongs to Maxwell. Maxwell deduced that a magnetic field can
be induced by an electric field that is changing with time. This sort
of induction is the basis of the "induction current" used in circuits.
Without the induction current, there could be no electromagnetic
waves. Neither Faraday nor Gauss nor Ampere came up with induction
current. Maxwell deduced the induction current term from the rest of
the equations plus conservation of energy. He compiled the Maxwell
equations, but he did add one term of his own.
You are right for most of the other terms (15 other terms?) in
Maxwell's equations. Actually, it was Faraday and Ampere and Gauss who
wrote the lions share of "Maxwell's equations." All Maxwell came up
with is induction current (idea 1) and the hypothesis of an
electromagnetic wave (idea 2). Someone else, I forgot who, associated
light with this hypothetical wave. Hertz (?) experimentally
demonstrated radio waves based on Maxwell's theory. However, Maxwell
did come up with two key ideas that were entirely novel.
As other brilliant scientists, Maxwell's contribution revolves
around a "minor" addition to the accumulated store of previous
knowledge. In fact, just compiling the other terms would have been a
type of accomplishment. However, coming up with induction current and
EM waves has to count as a major coup in theoretical physics.
.

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