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
