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How fast do you want it rotated? It's fairly simple to construct a system
to produce rotating EM waves at whatever rotational velocity you wish by
feeding a pair of broadside dipole arrays with quatrature phased waves.
It is quite simple to construct a system that would have a rotational
velocity of C within the uniform field area. It might also be fairly easy
to do this with a Hemholtz coil arangement as well, but the broadside array
will be much easier to do at easily engineerable frequencies.
Some really interesting paradoxes come about when the rotational frequency
is high enough so that the rotational velocity exceeds C within the uniform
field area of the arrays or within the hemholtz coils.
Robert Shannon
What effect would there be at the boundry where the rotational velocity reached, and then exceeded the speed of light? How could the magnetic field even propogate to the center of the antenna structure if it would have to move faster than light to reach that space? If hemholtz coils were used instead of loops, the magnetic field strength would be uniform inside the structure, how could the field strenght be uniform if there is not sufficient time for the field to propogate through the space inside the structure itself? Could such an effect actually generate a wormhole like phenomena, at energy levels far below that of neutron stars and such? As the causal mechanism, the magnetic field, is in roation, would this describe a traversable worm hole as has been postulated in relationship to rotating black holes?