17. Exercise your visual brain with this optical illusion

checker shadow brain teaser

Which square (A or B) is darker?

 

Click HERE to dis­cov­er the answer and explore a sur­pris­ing phenomenon.

 

Next brain teas­er in Sharp­Brains’ top 25 series:

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9 Comments

  1. miss on January 11, 2008 at 11:49

    both same shade, i think



  2. Keith on January 21, 2008 at 2:23

    Yep They are the same. I had a hard time believ­ing it, but open the image in Adobe Pho­to­shop, and took a teardrop sam­ple from both squares. They are the exact same grey val­ue. :) Weird..



  3. yahobahne on January 21, 2008 at 6:59

    A is a more dark­er grey than B



  4. yahobahne on January 21, 2008 at 7:15

    I went to the proof and expla­na­tion and I still don’t believe A&B are the same gray. I hold fast to my above com­ment. I just don’t get it.



  5. Guyguy on January 25, 2008 at 12:17

    Print the pic­ture and fold the page so the squares are togeth­er. You’ll see they are iden­ti­cal in shade



  6. Alvaro on January 26, 2008 at 3:10

    Guyguy, thanks for propos­ing a great way to find out!



  7. Aaron on March 23, 2008 at 10:37

    I think A is dark­er, B is a lighter col­or just shad­ed by the cylin­der, but A is a real­ly dark color.



  8. Anjani on May 9, 2008 at 5:36

    A is more dark­er grey in col­or than B



  9. hides on January 30, 2009 at 10:32

    wow, they are the same



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