points: 33

Optical Illusion Stopping The Flow of Water

An optical illusion created using sound and the cameras shutter speed, pretty neat effect.

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by yak

submitted April 12th 2012

36 comments
what do you think? let everyone know!
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comments (36)
witchcraft
5 years ago
BURN HER!
5 years ago
And that, is why mathematical formulas work in physics.
5 years ago
why?
5 years ago
It's an OPTICAL illusion. As in it's the cameras' fault. Notice the speaker that the tube is taped to. I'm not quite smart to explain it, but I'm not too stupid to not understand what's happening... :\ Average
5 years ago
^ non geeks can not properly enjoy the simplistic beauty of geeky things
5 years ago
You morons, this isn't an optical illusion. The sound waves hold the water in place. They do this all the time with heavier items such as a small golf ball. And mako, that's what physics is. Math math math equations equations equations. http://www.youtube.com/watch?v=94KzmB2bI7s
5 years ago
And fuck you, Jrob. :)
5 years ago
fuck your whore mom
5 years ago
My mommy is dead :(
5 years ago
i will dig that skank up fuck her corpse in front of you and shake her cum filled skeleton in front of you
5 years ago
Oh man, we gotta badass over here.
5 years ago
Is that supposed to be Neil deGrasse Tyson? hahaha
5 years ago
now that i look at that,that is a turrble shoop
5 years ago
Yeppp lol I think it was about my second one first was bono with ms paint...
5 years ago
You're actually seeing 25 different drops [or segments of the stream] every second... the waveform being played through the speaker is vibrating the pipe in a uniform way, so the drops exit the pipe uniformly, the frame rate of the camera is synced with the speaker so the drops appear static, [and] the short shutter speed means the drops appear sharp and frozen in mid air [a longer shutter speed, in contrast, would capture more of each droplet's movement, causing it to appear blurry
5 years ago
Sure a longer shutter speed would mean a narrower f-stop therefore more would be I focus. My guess he is using tilt-shift lens.
5 years ago
Close, but its not the shutter speed, its the framerate. There are no shutters on digital cameras
5 years ago
Bingo
5 years ago
Its not exposure time either, because you would see motion blur,
5 years ago
You need a short enough exposure time to achieve this, faster then 25 fps. Even if there isn't a shutter there is exposure time. Then you need to adjust you diafragma to get enough light in there to actualy see something at that frame rate / exposure time. So you need to open the diafragma enough and/or adapt your light sensitivity (Iso). The wider the diafragma opens the shalower the Depth Of Field becomes. The settings here make that there is a shallow DOF and the camera has a hard time focussing the moving water. As it actually moves. What you see as a result is not what the camera is using to focus on.
5 years ago
Video runs 29.97 fps....
5 years ago
fps of the recording, not of this video that has been edited and converted to run at the optimal frame rate for the human eye
5 years ago
Video runs 25 fps in pal (actually 50 half frames) and almost 30 (60 half frames) in NTSC ... and as said it can be altered. Film is 24 fps and is a compromise for fluent movement and ease for the human eye. If they talk about 25, I'me guessing they are using PAL.
5 years ago
And of course nowerdays there is progressive scan, then you project images as a whole on the screen. PAL and NTC standards actually date from the interlaced era. When The image was divided in a set of odd lines and a set of even lines. The odd lines would be projected for 1/50 (60) of a second then came the even lines. Then the odd of the next picture .... etc etc etc. And that's what is recorded or sent to a TV set; The camera itself can actually have his own framerate, but often it is kept at equals of 25 or 30 to easy the recording and editing process.
5 years ago
thats exactly what i just said. all you need to do to achieve this is to match the fps with the sound frequency the same way you can harmonize the flash rate of a strobe light to the speed of a fan to make the blades look they are standing still or make a two bladed fan look like it has three blades
5 years ago
I wonder how they actually do the sync.
And I know that's what You said dw. I'me just a little pissed off due to some stupid shit around me today and felt the need to explain why I said what I said earlier.
5 years ago
trial and error alone will find you the correct fps sync with the speed water is pulled by gravity.
5 years ago
When you watch a car chase on tv the wheels look like they are going backwards. So it's the same deal here?
5 years ago
yeah
5 years ago
I caught something similar on my phone of a planes propeller, not intentionally though. It looked like the propeller was standing still and depending on the angle of my phone it would look like the size was fluctuating.
5 years ago
brule story crow
5 years ago
yea airplane propellers look cool through a camera on a phone
5 years ago
Sometimes they make the propeller looks all twisted too.
5 years ago
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