Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: 7 <7@enemygadgets.com> Newsgroups: sci.physics Subject: Re: How do we create 2D space? Date: Sun, 08 May 2016 17:01:40 +0000 Organization: enemygadgets.com Lines: 41 Message-ID: References: <4eb0f7e0-0235-4283-87ed-7b867ff1685c@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Trace: individual.net SZMrmyIPlUZsiKwE+5gvggPNsTSRHeQou1M7FxOJstllaR2XvP Cancel-Lock: sha1:h/dIHiLA/+rwgkZ5J2CT/T40vLU= User-Agent: KNode/4.13.3 Xref: csiph.com sci.physics:576498 Poutnik wrote: > Dne 08/05/2016 v 17:35 7 napsal(a): >> Poutnik wrote: > >>>> >>> It depends what you consider infinite. >> >> In order for a plane to be planar and >> infinite and stable, it needs to be surrounded by >> a high energy barrier that prevents anything >> from hopping out of it. > > But spaces need not to be Euclidean, > and often are not. >> >> For a spherical 'infinite' object, parallel >> lines drawn on it will always meet. > > sure/ > >> So its not infinite or planar as we scale up >> the geometries, but it is stable. > > Finite objects have their ends, infinite do not. > spherical 2D space does not have end. > >> >> So the 2D planar sheets are curious - they need infinite >> energy above and below the plane to prevent anything >> tunnelling into another plane, and it needs to be >> infinitely big in order for it to be stable. >> > It has nothing to do with energy. Yes it would do, otherwise, even if simple object gained some energy it would escape the two dimensions allotted to it. There has to be a very large energy barrier to prevent objects tunnelling out of the 2D space and dissipating.