Published: November 20, 2015
Total Running Time: 00:03:08
A line of flickering light is just a line, right? Maybe, or maybe not—try shaking your head, and see what appears. Persistence of vision makes a rapidly flickering line of light appear as a complete image on the back of your eye. This "loophole" in your vision system has been used by television programmers for years. See what you can see!