[Physics] Physics Digest, Vol 27, Issue 1

[cj at mb-soft.com]

Your group makes some assumptions which most of us theoretical Physicists 
would avoid.  A few years ago, I described a fairly simple experiment that 
would confirm/deny that gravitation travels faster/slower.

I had described a kilometer deep (extremely vertical) borehole, possibly 
near the Equator.  No one seems to have ever thought about what seems 
obvious to me.

Hang a slim pendulum inside it, one metric ton.  And include several 
45-angle mirrors to the sides of the pendulum bob.  Use conventional laser 
interferometers to precisely monitor the exact position of the bob in the 
borehole.

Newton had pointed out that Gravitation is a Vector quantity.  At the moment 
of moonrise at that location, the gravitational attraction of the Moon is 
exactly horizontAl (through the Earth) and the Moon causes the pendulum to 
be attracted, toward the East, with a force of 0.03317902 newton, which 
pulls the bob horizontally toward the East by about 3.38561456 millimeters. 
Roughly 12.5 hours later, it is moonset, and the Moon's gravitation pulls 
the pendulum westward roughlly the same distance.  The laser inteerferometry 
and mirrors is accurate enough to monitor that gravitational attraction of 
the Moon, every minute, every hour, and every day, where massive data can be 
collected.

Data analysis can determine whether the gravitational attraction operates at 
the speed of light or whatever other speed.  It would certainly make clear 
if the velocity of gravitation changes by a factor of 1.5.

Eveen better data should be available if both the Moon and Sun gravitational 
Vector effects are monitored.  For example, it may be possible to monitor if 
gravitation due to the Sun gets here sooner or later when we are at 
Perihelion or Aphelion   (a fraction of a second)

IF there are (vector) gravitational waves from distant massive bodies, this 
equipment should be accurate enough to monitor the timing as the Earth 
rotates every day.  (I have my personal doubts about whether that could be 
measurred, as I see the math showing that such gravitational waves seem to 
be based on wavelengths of around 3 billion light years, and therefore 
probably beyond our ability to measure.

http://mb-soft.com/public4/gravmoon.html

Carl Johnson