Sharp Brains: Brain Fitness and Cognitive Health News

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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.


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12 Responses

  1. miss says:

    both same shade, i think

  2. Keith says:

    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 says:

    A is a more darker grey than B

  4. yahobahne says:

    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 says:

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

  6. Alvaro says:

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

  7. Aaron says:

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

  8. Anjani says:

    A is more darker grey in color than B

  9. hides says:

    wow, they are the same

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