German cameraman Chris Fay recently posted on YouTube a neat video showing what happens when the frames per second on a camera and the speed of a helicopter rotor are perfectly aligned. The helicopter blades appear not to rotate at all. And the helicopter hovers magically in the air. Even if you know the mechanics of the illusion, it’s still fun to watch!
Would you like to support the mission of Open Culture? Please consider making a donation to our site. It’s hard to rely 100% on ads, and your contributions will help us continue providing the best free cultural and educational materials to learners everywhere.