Re: johnreed take 14  2005
 From: "Bill Hobba" <bhobba@xxxxxxxxxxxxxx>
 Date: Mon, 23 May 2005 22:33:19 GMT
<randamajor@xxxxxxxxx> wrote in message
news:1116882081.569676.183890@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> What do we mean when we say spacetime is curved?
Simple  in flat spacetime we can find a coordinate system such that ds^2 =
ct^2  x^2  y^2  z^2 at each point. If not then not then it is curved.
> How do we conceptually
> grasp a curvature of spacetime? What do we mean when we say space is
> curved? How do we grasp a curvature of space?
By studying Riemanian geometry.
>
> Actually we don't.
>
So all the mathematicians since Riemann are fooling themselves?
Bill
> Instead we say, in such a space the motion of an
> object could be described in terms of the geometry of the space, rather
> than in terms of external forces.
>
> "The motion of an object" and "described in terms of the geometry of
> space". The motion of an object is one thing. The trajectory of an
> object is another. In any event, we are calling the space curved to
> describe the trajectory of the object and its motion. Kinda' like
> looking at a color photograph negative and trying to discern the
> picture.
>
> We are realy dealing with the trajectories of objects after all, and
> those trajectories are least action trajectories, so we have a least
> action, curved space, and spacetime.
>
> Newton's use of the least action property of stable systems was a
> little more crude. Einstein's use is attenuated to the max. I will
> continue with this theme later but for now,
>
> I say gravity does not exist. Mass operates within least action
> parameters. Mass does not follow the path of a least action space.
>
> johnreed
>
.
 FollowUps:
 Re: johnreed take 14  2005
 From: randamajor
 Re: johnreed take 14  2005
 From: Baugh
 Re: johnreed take 14  2005
 References:
 johnreed take 14  2005
 From: randamajor
 johnreed take 14  2005
 Prev by Date: Re: A Unified Field Theory by Lloyd Dudley Burris
 Next by Date: Re: another mistake in physics
 Previous by thread: johnreed take 14  2005
 Next by thread: Re: johnreed take 14  2005
 Index(es):
Relevant Pages
