A dad’s recent Twitter post is causing major confusion. Marc Blank-Settle posted a video of his toddler’s two train tracks. When arranged side-by-side, one of the wooden track looks significantly smaller than the other one, but when placed directly on top of each other they appear to be the same size.
Blank-Settle who is a journalist for the BBC, tries the experiment a couple of times to ensure it’s no accident. Twitters have responded by explaining that this is simply a case of Jastrow Illusion. Named after American psychologist Joseph Jastrow, this optical illusion appears when two objects are aligned with the shorter edge of the object at the top compared to the longer side to the one at the bottom.
Take a look at the video and see if you can find the differences.