Jeff wrote:

Ok, maybe so. Is this right...? Suppose a wire is part of a closed circuit,
that magnet would certainly induce current. Now, if that wire were NOT
closed, but in the form of some antenna, then at an appropriate frequency, in
the part of an antenna that normally sees current (at the feedpoint end), you
would see a current, thus all the other attributes of an antenna subject to
an electromagnetic field would also exist? IF (I'm not stating, just trying
to follow a thought based on what you said), IF this is so, then it would
mean the EM wave existed with or without the wire, purely because the magnet
was spinning.

Alternatively, does it just mean that an alternative magnetic field near an
antenna feedpoint is as capable of inducing a signal out of the antenna as an
electromagnetic wave is?

Maybe I should go back to my popcorn. I may not even understand what I see,
but I want to watch.


It means that a rotating magnet will produce a radiated EM field,
nothing to do with any other piece of wire or antenna in close proximity.

Nope.


As Garth claims it is inherent in Maxwell's equations that this must happen.

Nope.

What Maxwell's Equations say is a moving magnet produces a moving magnetic
field.

A moving magnetic field is not an electromagnetic field.

If you want pictures then have a look at:
http://www.falstad.com/emwave2/index.html
and select rotating magnet and Poynting Vector.

Jeff

--
Jim Pennino