William wrote:

discusses the propagation of the EM fields created by a oscillating
charge. At distances much less than one wavelength the fields propagate
with infinite speed and as they propagate away from the source they
reduce to the speed c.

But decreasing something continuously from infinite to finite is not
possible in principle. At what point do you consider the
transformation, which must be discrete in order to occur at all, to occur?


Bob
--

"Things should be described as simply as possible, but no simpler."

A. Einstein