On Feb 5, 2006, at 10:13 PM, Harry Veeder wrote:
Horace Heffner wrote:
[SNIP]
...fields do not just appear from nothing and without effect.
Well...when an electromagnet is turned 'on' a magnetic field appears.
I am only referring here to the mechanism by which a field builds
from nothing, which is probably just unnecessary nit picking with
regard to your point. When a voltage is applied to a coil the
current builds slowly due to the need to supply energy to the
magnetic field. Also, the field itself, i.e changes in the field
strength due to changes in current, only expands through space at the
speed of light.
As we accelerate through a Coulombic field a magnetic field "appears"
in our vicinity, but the rate of its appearance corresponds to our
acceleration and thus it builds gradually.
Perhaps there is a construction which can make a gravimagnetic
field appear.
The construction which makes a gravimagnetic field appear is
gravicurrent - the motion of mass. Masses in motion experience
different forces due to each other at the some given distance when in
relative motion vs being fixed in those positions, just as charges
similarly experience differing forces.
Horace Heffner
