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Nick
Empty space transmits gravity.

Unfortunately we are not able to measure empty space without putting something into it. The best we have are predictions of quantum fluctuations influencing real particles. Therefore there will always be real matter in the vicinity and no true vacuum when it comes to virtual particle measurements.

What is empty space doing?
Confused2
For starters

Probably ought to look at other stuff first but never mind ..

http://en.wikipedia.org/wiki/Unruh_radiation

-C2
Precursor562
Personally I don't think that true empty space exists. That there an extremely small set of particles (smaller than neutrinos) That fill this space with no space in between and move faster than the speed of light with no sense of direction. So although they are more tightly packed than molecules of the most dense of solid matter, they move around faster than the molecules of the hottest of gasses. Even faster than light where light speed is 299 792 458 m/s these sub-sub atomic particles move at the true speed limit of the universe 300 000 000 m/s.
Zephir
QUOTE (Nick+Jul 25 2006, 01:07 AM)
..Therefore there will always be real matter in the vicinity and no true vacuum when it comes to virtual particle measurements...

Of course, this is quite valid insight. By AWT no energy can be transferred at distance without some inertial environment.

user posted image

QUOTE (Precursor+Jul 25 2006, 01:07 AM)
..and move faster than the speed of light with no sense of direction...

The light speed limit doesn't need to be violated necessarily by such assumption, see the animation above. It illustrates the gravitational wave spreading from annihilated particle.
Dean
Empty space is really important. It's like the paper that the universe is drawn on. It's not interacting with anything, rather, it's giving it a place to exist. If you we're to take everything away, there would still be empty space.
Nick
QUOTE (Dean+Aug 7 2006, 10:55 AM)
Empty space is really important. It's like the paper that the universe is drawn on. It's not interacting with anything, rather, it's giving it a place to exist. If you we're to take everything away, there would still be empty space.

Einstein said that he wasn't interested in particles as much as he was what is in between them. biggrin.gif
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