It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Originally posted by Bedlam
No big deal. What you're seeing falls into the larger group of phenomena we call 'aliasing', and the subset of that called the stroboscopic effect.
Whenever you see videos of helicopters with the blades not turning, or cars moving forward when the wheels appear to be turning backwards, it's the same thing as this. Note that the instructions say to set the shutter speed to 24 fps, then diddle the audio generator between 23 and 25 hz. That causes aliasing between the water motion caused by the speaker and the shutter rate of the camera, and voila! weird stop motions and things that appear to be moving backwards.
Originally posted by Vandettas
Seeing as how you had to explain all of that, I'd say it is a pretty big deal.