Luis, repeat 10 times: 3 dimensions = inverse square law for a force (=dp/dt).

Where is the 4th dimension? Even very sensitive experiments have shown EXACT square for known forces on a large scale? No electrostatic field in shieleded cage is ONLY the case when inverse square law holds to very high degree accuracy. Planets/moons/satellites moving EXACTLY as inverse square for gravitational interaction requires (plus GR effects).

On a very small scale (Plank or so) elementary particles may have MORE than 3 spatial degrees of freedom, because this does not contradict any experimental data we have (just because we currently have no experimental data about forces on Plank scale).

But on large scale our universe still only 3 spatial dimensions only. For gravity experimental data are from 0.5 mm and to the size of visible universe, for e/magnetizm - from 10-18 m to several hundred thousands kilometers as modelling of charged particles in Saturn rings shows).

• Alex = 1st non-religious person on my ignore list. :( - luis_hamburgh - December 2, 2001 - 21:15 UTC
  • - luis_hamburgh - December 3, 2001 - 18:26 UTC
  • Luis, if we have inverse square, space is 3-D (for gravity). - alexander - December 3, 2001 - 22:42 UTC