-Spiral Picture: taylor.teamtaylormade.com
-Arc Picture, Arrowed Line Picture, Information- "Why you are Fooled": Cobb, Vicki. How to Really Fool Yourself. New York: John Wiley and Sons Inc., 1999. Page 43.
Here we have great optical illusions!
Why you're fooled: You're fooled because the shorter arc of the top arc is next to the longer arc of the bottom arc, so they look different sizes, but they are really the same size!
Which are is bigger?
Which line is bigger?
Why you're fooled: You are fooled because the way the arrows are pointing at each end of the lines makes us think one is larger than the other, but in reality, they are the same size!