Glitch City Laboratories Archives

Glitch City Laboratories closed on 1 September 2020 (announcement). This is an archived copy of a thread from Glitch City Laboratories Forums.

You can join Glitch City Research Institute to ask questions or discuss current developments.

You may also download the archive of this forum in .tar.gz, .sql.gz, or .sqlite.gz formats.

General Discussion

Some interesting optical illusions - Page 1

Some interesting optical illusions

Posted by: blitzer
Date: 2008-10-30 17:56:14
http://en.wikipedia.org/wiki/Ebbinghaus_illusion
Two congruent circles are surrounded by other circles, one of them surrounded by large congruent circles, and the other surrounded by small congruent circles. The one sưrounded by small circles seems to be bigger.

http://en.wikipedia.org/wiki/Lilac_chaser
Stare at the black + for 20-30 seconds.

http://en.wikipedia.org/wiki/Caf%C3%A9_wall_illusion
Parallel lines appear to be bent.

http://en.wikipedia.org/wiki/Image:Revolving_circles.svg
Move your head back and forth.

http://en.wikipedia.org/wiki/Missing_square_puzzle
Four objects are formed to make a 13 by 5 right triangle. When rearranged, they seem to form a triangle with the same proportions, except with 1 missing square.

http://en.wikipedia.org/wiki/Fraser_spiral_illusion
A spiral? Not really.

Re: Some interesting optical illusions

Posted by: Ratipharos
Date: 2008-10-30 18:16:56
The 'False Spiral' is trippy.

Re: Some interesting optical illusions

Posted by: atoms2ashes
Date: 2008-10-30 22:21:32
The False Spiral was the greatest.

Re: Some interesting optical illusions

Posted by: Bassmasta
Date: 2008-10-30 23:36:31
I see the false spiral every day in science, so I thought the revolving circles were the best.

Re: Some interesting optical illusions

Posted by: Guy
Date: 2008-10-31 16:03:40
I liked the Lilac chaser one by far the best.

Re: Some interesting optical illusions

Posted by: blitzer
Date: 2008-10-31 22:03:56
T'is my favorite too.