Broken Line Illusion by Brad Honeycutt
Do the two ends of the green line passing behind the gate appear offset or aligned?
The two ends of the line are completely aligned, although they appear to be offset. If you don’t believe it, use something straight, like a ruler or sheet of paper, to confirm. German physicist Johann Christian Poggendorff discovered this illusion in 1860. As such, it is often referred to as the Poggendorff illusion.
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