[Physics] Physics Digest, Vol 27, Issue 1

[Tom Hollings]

Carl, I like your thinking there. A couple of thoughts spring to mind. Why does the borehole have to be that deep and vertical - and you stressed vertical. Would a deep cave or cavern not do? If the pendulum is predicted to move by 3.38 mm, why use mirrors etc, when direct/camera visual observation would show that movement?
All the best,
Tom Hollings.



> On 01 May 2020 at 16:01 cj at mb-soft.com wrote:
> 
> 
> 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
> 
> 
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