Beer
On Fri, Aug 9, 2013 at 11:32 AM, H Veeder <[email protected]> wrote: > > > > On Fri, Aug 9, 2013 at 7:43 AM, Terry Blanton <[email protected]> wrote: > >> Dynamic visual aid: >> >> http://nofiriantirani.wordpress.com/2013/07/14/ilussion/ >> >> Can you imagine this in 3D? >> >> > > what determines the speed of this wave? > > http://www.youtube.com/watch?v=GfX0j7-fLmk > > > > Harry > >
