This now strikes me as a MUCH MORE impressive illusion than at first!!! Because whenever I stare at one line, then switch to the other, the second one always seems longer! Regardless of which one was first! —Dan
On Aug 25, 2015, at 1:19 AM, rwg <rwg@sdf.org> wrote:
gosper.org/Muller-Liar.gif [2] (Subj. was: (_|_) and 6pents)
On 2010-08-19 20:17, Dan Asimov wrote:
Huh? At least to the nearest pixel, both lines are the same length. They are corresponding diagonals of congruent regular pentagons.
I find this to be an impressive illusion.
--Dan
<< << To me the stick that is in fact longer looks like it is in fact longer. If they're supposed to be the same length I think your image needs a bit of editing.
On Thu, Aug 19, 2010 at 4:31 PM, Bill Gosper <billgosper@gmail.com> wrote:
While hacking the pentagon fill, tutor Julian found www.tweedledum.com/rwg/6pents.png [1], which seems to work backwards: The stick larger than its context appears smaller than the stick smaller than its context.
_____________________________________________________________________ "It don't mean a thing if it ain't got that certain je ne sais quoi." --Peter Schickele
Links: ------ [1] http://www.tweedledum.com/rwg/6pents.png [2] http://ma.sdf.org/gosper.org/Muller-Liar.gif _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun