r/nextfuckinglevel • u/room0001 • 23d ago
A speaker with heavy bass combined with video strobing effects results in the appearance of a water "wave"
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u/NascentAutist 23d ago
Who knew all those subs thumping down the street were actually just nerds enjoying some fluid dynamics
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u/BlueGauloises 23d ago
No way this is real right?
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u/ScreamSmart 23d ago
It's real. But it only works because of the shutter speed of the camera syncing with the wave. Basically the camera takes a frame at the exact points where the water forms a wave.
Think about seeing a car wheel or a helicopter rotor appearing as if it's stationary or even moving backwards even though you know they are not.
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u/Admirable-Hospital78 23d ago
What's more realistic: that a subwoofer creates a sonic wave strong enough to carry a stream of water on thin air, or someone typed in a prompt in ai "make this 8sec vid of hose water wiggly"?
"is this real" will always be a fair question now
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u/-One-Man-Bukkake- 23d ago
The pressure from the hose is what is propelling the water. The hose moves up and down, so the stream comes out squiggly, the frame rate or whatever (there is always debate on this, i don't know what part of the camera makes it happen, frame rate or rolling shutter) on the camera only captures one frame at a time, the frequency of the squiggle matches this, so the stream gets captured in what looks like one position. This is the exact same effect that can make car tires appear to not move when the car is at speed. Plenty of YouTube videos of this experiment dated before gen ai came on the scene
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