Frank, your emphasis is on conservation of momentum, which is important
but not sufficient. You also introduce the mechanism of sensing the existence
of a fixed field, which is irrelevant. I ask how a structure can
form when the time needed for one part to sense the characteristics of
another part takes millions of years to be communicated? How does
a star at one side of a galaxy know that its gravity and momentum are being
exactly balanced by a star on the other side when this information takes
a million years to pass between the two stars. The existence of an
unstructured cluster of stars is not hard to explain. However, formation
of a spiral galaxy is impossible unless the stars can communicate rapidly
compared to their relative transitional speed. This requires either
gravity or some other force to be communicated much faster than is normal
EM radiation. I might add for your comment, that if this is true,
all arguments about time based on the speed of light have no reality.
Ed
[EMAIL PROTECTED] wrote:
The induced field
is not superluminal. Take the electric force for example. The
force between two charges is equal and opposite. The system conserves
momentum. Now one charge is moved. It moves into in the established
field of the first electron and immediately fields the force. No
time delay is had. The first electron, however, does not sense that
the second has moved until the disturbance in the field reaches it at light
speed. It appears for the moment that momentum is not conserved.
What happens is the movement of the charges induces a local magnetic field.
The force imparted by the induced magnetic field is just the right strength
to keep the momentum of the system balanced. Nature goes through
great lengths to conserve momentum. I hope this answers your question.
Frank Z
