Oscillating water flows observed by LED-strobe system. Scientific Illusion !

The strobe light can make people possible to see periodic-phenomena such as water flows from vibrating small tubes. If you set that the frequencies of the vibration and the light-on-off are the same, you can freeze the droplets in the air. If you set that the frequencies are slightly different then you will see the slow-motion of the droplets as shown in this movie. Note that it is Not the “camera-fps magic.“ It is true that what you see is what you get (WYSWYG ! (^^)). This 2016-system is the updated v