I present you with two lines: AB and BC. Which one is longer? Yes,
you guessed it again! You're so smart! The lines are exactly the same...
otherwise why would I be asking you a silly question like this on an
optical illusion website? Actually, yes. As you click on to more illusions, you'll see a similar illusion, and I cheat. The lines usually would appear to be straight, but I've adjusted them so they are not the same, just to keep your brain quick and to keep you on your toes and paying attention.
This illusion could be made even stronger if a little more perspective was brought into it, including making the A and C slightly larger, as well as making the lines not exactly the same width throughout, so that AB and AC would converge a little more before making it to B.
Please rate this illusion/picture. Your ratings help us choose which new optical illusions to create, plus, it's fun!
Best of the Best ...
Most Popular for June 2010:
Same Shade Diamonds Our newest optical illusion.
We just created it on 10/10/2009
Wow! It will look like the diamonds on the top are much darker than the diamonds on the bottom.
You won't believe how amazing this incredible optical illusion is.
Watch as the scary faces disappear before your eyes.
The longer you stare the stronger the illusion. Perfect to send to your friends for Halloween!
The Obama Illusion
We made this original Barack Obama Illusion and then we made it famous!
Stare for about 30 seconds and you'll see his ghostly image appear on the wall!
Valentines Day Love Test Illusion
This is one of our most highly rated illusions by our visitors. Watch the hearts disappear before your very eyes!
This is really cool. You'll start to see the hearts disappear as you fixate at the center. Don't miss it.
Moving Spiral Illusion
A version of our original moving spiral illusion was recently published in a popular college textbook.
It uses multiple illusory principles to give the illusion that it is moving when it is absolutely not moving. Big enough to be your desktop background!
Build Your Own Impossible Triangle
Instructions so you can build your own impossible triangle. Tell M.C. Escher that it's not so impossible after all!
Comes with a printable PDF guide with dotted lines for the folds and clearly marked lines to cut. See pictures of visitors submitted triangles too!
If you don't have time to see the hundreds of illusions today, see if you can at least catch all of these...
