Re: Question about the aether

Jerry W. Decker ( (no email) )
Wed, 05 Apr 2000 01:58:57 -0500

Hi Peter, DM, et al!

It strikes me, for what its worth, that this Fresnel drag is
suprisingly similar to the Lense-Thirring frame dragging
which is believed to be directly caused by aether. Though
after putting together the following and since this is about
aether, it appears frame dragging is more 'to the point'
than Fresnel.

Here is Fresnel drag from Harold Aspdens site;

http://www.energyscience.co.uk/tu/tu05.htm

So what is Fresnel drag? Well, if you measure the speed of
light in a block of glass or in a tank of water the speed is
reduced below that applicable in the vacuum, reduced by a
factor we call the refractive index. That you will know.

If, however, the glass or the water is itself moving through
space and relative to the laboratory frame, then the speed
of light in passage through that medium is affected by that
speed.

It is a function of the speed of the test medium and the
speed of that medium relative to the laboratory frame. The
experiments on this provide the formula for the drag
coefficient involved and we call this the 'Fresnel drag
coefficient'.
--------------------
Now compare that to Lense-Thirring frame dragging;

http://www.treasure-troves.com/physics/Lense-ThirringEffect.html

An effect predicted by General Relativity and also known as
Frame Dragging in which the orbit of a small body orbiting
around a rotating massive one is slightly perturbed by the
rotation. The effect was first predicted by Austrian
physicists Joseph Lense and Hans Thirring in 1918.

from an Einstein page;

http://science.msfc.nasa.gov/newhome/headlines/ast06nov97_1.htm

The next time you feel like you're barely dragging along,
blame relativity. You'll be stretching the point, but it
appears that Einstein was right: space and time get pulled
out of shape near a rotating body.

Einstein predicted the effect, called ``frame dragging,'' 80
years ago. Like many other aspects of Einstein's famous
theories of relativity, it's so subtle that no conventional
method could measure it.

an artist rendition and a brief description;

http://users.supernet.com/dharp/physics/inertia2.html#dragging

....its curvature is determined by the distribution and
motion of mass-energy in the universe. The distribution
aspect produces components of curvature normally associated
with gravitational phenomena.

However mass-energy motions (or mass-energy "currents") also
may have an influence on spacetime geometry.

(DePalma claims heavy rotating masses produce an effect that
can be measured due to the entrainment by these 'matter
currents')

Since the properties of local inertial frames are determined
by the geometry of the local spacetime, we call the dragging
effect produced by mass currents frame dragging. It is also
called the Lense-Thirring effect after Josef Lense and Hans
Thirring, who first gave the quantitative analysis in 1918.
-----------------------
Meaning if we can get a heavy enough object, or a high
density energy blast to rotate fast enough, it SHOULD create
matter currents that could alter space time enough to be
measured and used.

--             KeelyNet - From an Art to a Science        Jerry W. Decker - http://www.keelynet.com/discussion archives http://www.escribe.com/science/keelynet/KeelyNet - PO BOX 870716 - Mesquite, TX 75187 - 214.324.8741

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