Look at these figures and say which one is bigger? Click on the button to answer
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The Jastrow illusion is named after the American psychologist Joseph Jastrow, who discovered the illusion in 1889.
The Jastrow illusion is an optical illusion where two identical figures are placed next to each other.
Although they are both exactly the same size, one appears to be larger.
The fact that the shorter side of one figure is next to the longer side of the other somehow tricks the brain into perceiving one shape as longer
and the other as shorter, although it is unclear exactly why this is so.
Now click on the PLAY button and see what happens...