Cut the knot: learn to enjoy mathematics
A math books store at a unique math study site. Shopping at the store helps maintain the site. Thank you.
Learning Math Online
Sites for teachers
Sites for parents
Terms of use
Awards
Interactive Activities

CTK Exchange
CTK Wiki Math
CTK Insights - a blog
Math Help

III Millennium Olympiad

Games & Puzzles
What Is What
Arithmetic/Algebra
Geometry
Probability
Outline Mathematics
Make an Identity
Book Reviews
Stories for Young
Eye Opener
Analog Gadgets
Inventor's Paradox
Did you know?...
Proofs
Math as Language
Things Impossible
Visual Illusions
My Logo
Math Poll
Cut The Knot!
MSET99 Talk
Other Math sites
Front Page
Movie shortcuts
Personal info
Privacy Policy

Guest book
News sites

Recommend this site

Games to relax

Sites for teachers
Sites for parents
Education & Parenting

Manifesto  |  Bookstore  |  Contents  |  Amazon store  |  Term index  |  What changed?  |  Contact  |  Recommend
RSS Feed: Recent changes at CTK

Unfolding Spirals Illusion

 

This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at http://www.java.com/en/download/index.jsp, download and install Java VM and enjoy the applet.

Buy this applet
What if applet does not run?

A few words

Copyright © 1996-2009 Alexander Bogomolny

 

 

 

 

 

 

 

 

 

Unfolding Spirals Illusion

Several effects could be observed depending on the specific values of the available parameters. Spirals may appear to interlock, concentric circles may seem to be shifted relative to each other. Sometimes the pieces will appear move like in the Revolving Circles Illusion.

The idea is due to the Japanese psychologist Akiyoshi Kitaoka, see [McNaughton, pp. 46-47].

References

  1. P. McNaughton, Perspective and Other Optical Illusions, Walker & Company, 2007

Copyright © 1996-2009 Alexander Bogomolny

34221997Page copy protected against web site content infringement by Copyscape


Search:
Keywords:

Google
Web CTK