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By on August 5, 2012, with 18 Comments

Another cool illusion featured and explained by COGSCIdotNET is the Reverse Spokes Illusion. This particular effect was discovered by Anstis and Rogers, and it works in a way so that grey lines (or “spokes”) separating the pizza into slices, appear to be rotating clockwise. However, on a closer inspection you can clearly see that this is not the case!

What is happening here is that the grayish color-wave traverses the wheel in a counterclockwise direction, and the spokes occasionally get gobbled-up by the pizza slices. This occurs because two of the pizza slices are of the same color as the spokes!

  • Roosie

    You mean it looks like it’s moving around when the lights on/off it and really it’s not…. Oh, yeah – I see it when you say it like that! :)

  • z2d4th

    this is what i called real and fantastic illusion

  • Adam

    Now that’s awesome. Nice find.


    Love this one. Great effect. Still amazed at how it tricks my mind into seeing it move!

  • Indiana Jones

    Very simple, yet very powerful. Love it!

  • clues

    So cool I wish it was something that I could do!

  • bob


  • good illusion, but been around for ages!

  • glittergirl

    weird, i dont get this?
    first comment though!!!!!!!!

  • it sounds good

  • ?

    I don’t see it.

  • ?

    Oh! I see it now!

  • Care Bear

    Just looks like a big ol’ umbrella to me. Good thing. We’ve been getting a fair number of thunder storms lately. ;-)

  • shhhhhhh


  • rajan

    very good.

  • Maddie

    1It spins faster when you look at a nearby white spot.

    Cool illusion. Hurts your eyes BAD though

  • Alfred Money

    this is an animation its actually moving i copied to my pc and its like 7 pictures in one

    • Pancreas McGlockenspiel

      Umm, yeah, we know it’s moving.
      But the spokes aren’t.
      That’s kind of the point.

      I actually can’t believe you checked if it was moving!