Re: [Phys-L] Fwd: [PTSOS] spacetime simulator: flexible conduit?

[John Denker <jsd@av8n.com>]

On 07/19/2012 09:50 AM, William Maddox wrote:
> How would a repulsive effect, like the part of the
> cosmological expansion that is attributed to some type of "dark energy", be
> modeled using darts and tape?

You're a smart guy.  I reckon you would enjoy figuring out how to
represent negative curvature using darts ... and tracking the resulting
geodesic deviation using tape.

> I suspect the dart and tape model would be more confusing than
> helpful here.

Au contraire, I reckon the dart and tape model would be quite edificational
here.
  http://www.av8n.com/physics/geodesics.htm#fig-darts

Please give it a try.  If you really can't figure it out, please re-ask the
question.