Brian Reay wrote in
:

Why would waving a magnet, at ANY speed, do it? I never heard of such.
Got to be a stationary conductor involved too, somewhere very nearby.
The speed would have far less to do with anything than the matching of
kinetic energy into the conductor, and the matching of that to whatever
part of that conductor is an antenna.

Not a moving conductor, a changing electric field.


I mentioned stationary conductor, but my example was not rigorous..

He also seems to think that it is frequency which determines if it is an
EM wave, why else the
comment re fast enough. You can have a ELF radio wave, I know of
amateurs with NoVs to operate
around 9kHz.


Exactly so. That's what I was gettign at, that speed in itself means nothing,
it only becomes important when calculations need a frequency.


A magnet moving on its own reminds me of the question 'what is the
sound of one hand clapping?'

An apt comment.