<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Dear Albrecht,<div><br></div><div><div>In relation to the issue of the speed of propagation of gravity, the best article I know is this:</div><div><br></div><div><div>Van Flandern "The speed of gravity ? What the experiments say" Physics Letters 1998. v.250 (1-3), 1.</div><div><a href="http://www.ldolphin.org/vanFlandern/gravityspeed.html">http://www.ldolphin.org/vanFlandern/gravityspeed.html</a></div></div><div><br></div><div>The arguments in favor of an instantaneous propagation of gravity are very convincing for me.</div><div><br></div><div>In fact I am convinced that all force fields are transmitted instantaneously. You can see experiments that corroborate this hypothesis for the magnetic field and the electric field:</div></div><div><br></div><div><div>Kholmetskii A. L., Missevitch O. V. and Smirnov Rueda R., 2007, Measurement of propagation velocity of bound electromagnetic fields in near zone, J. Appl. Phys.102 013529</div><div><br></div><div>De Sangro, R., Finocchiaro, G., Patteri, P., Piccolo, M., & Pizzella, G. (2015) Measuring propagation speed of Coulomb fields. The European Physical Journal C, 75(3), 1-10.</div></div><div><br></div><div>Obviously, this hypothesis has important consequences with respect to the theory of relativity and the very existence of bosons as real force carriers particles.<br></div><div><br></div><div>Best Regards,</div><div>Oliver Consa</div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">El lun., 11 feb. 2019 a las 21:18, Albrecht Giese (<<a href="mailto:phys@a-giese.de">phys@a-giese.de</a>>) escribió:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p><span lang="EN-US">Hi Wolf,
hi
All,</span>
</p><p class="MsoNormal"><span lang="EN-US">some time
ago we had a discussion here about gravity. In particular
about the question
whether the propagation speed of the gravitational field is <b>c</b>
or infinite. The
problem behind is the fact that a finite propagation speed of
gravity should
cause rotating pairs of stars to permanently increase their
speed, because the other
star appears at a retarded position and so the force between
the stars should
have a tangential component. Our discussion ended at that time
with the result
that the Liénard-Wiechert potential would solve the problem.</span></p>
<p class="MsoNormal"><span lang="EN-US">This was
not very satisfying because the Liénard-Wiechert formalism is
only about the
field at a retarded time, and this description by itself does
not solve this
problem. I found that the solution is a completely different
phenomenon. It is the
fact (and as such well known in the physical literature) that
fields like the
electric field and also the gravitational field (our case)
never show
aberration. This is – according to literature – a well-known
fact which is also
theoretically well understood. But most are not aware of it,
like me. </span></p>
<p class="MsoNormal"><span lang="EN-US">Experimentally
it can in the case of the electrical field be proven in the
laboratory. And the
motion of stars show it for the gravitational case. <br>
</span></p>
<p class="MsoNormal"><span lang="EN-US">Do you feel that this helps?</span></p>
<p class="MsoNormal"><span lang="EN-US">Albrecht<br>
</span></p>
<p></p>
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