On Sun, Jan 28, 2018 at 1:08 PM, <mix...@bigpond.com> wrote:

.. go right ahead. :)

It will take a while.  :)  But in the meantime I'll replace the rowboat
analogy with a more apt one.  One description of gravitational attraction
is that of a mutual attraction between two bodies with mass.  It is similar
in that regard to magnetism or Coulomb attraction. Place a magnet on a
table and a piece of ferromagnetic metal near to it, and they will both
slide towards one another if their masses are on the same order. (If the
masses are not on the same order, this will still happen but just not be
readily perceived.)

The situation of a photon being attracted to a massive object without the
massive object being attracted (pulled) in the direction of the photon is
like that of a magnet that pulls on a ferromagnetic object without the
object pulling the magnet towards it as well.  The magnet would stay in
place on the table, undisturbed, while only the ferromagnetic object slides
towards the magnet.


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