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god needs to fix this in his next patch.


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This is really simple but has such an awesome effect. Fill a bucket full of water and place it about 5 feet off the ground. Place a subwoofer about 1 foot lower than the bucket. Run a plastic tube from the top bucket down in front of the subwoofer. Tape the tube to the front of the speaker. Then aim the end of the tube to an empty bucket on the floor. Get the water flowing from the top bucket. Now just generate a 24 hz sine wave and set your camera to 24 fps and watch the magic happen. Basically your cameras frame rate is synced up with the rate of the vibrations of the water so it appears to be frozen or still. Now if you play a 23 hz sine wave your frame rate will be off just a little compared to the sine wave causing the water to "move backward" or so as it appears. You can play a 25 hz sine wave and cause the water to move slowly foward.

Really fun experiment. You should definitely give it a try.

Thanks to JacobTMcgarry for giving me the OK to create my own version based on his original video:

www.youtube.com/watch?v=8GkHePfcpbY&context=C40ee253ADvjVQa1PpcFPcnUpDiHo1h6TW6wYQ8_-x5nQPWexhDR0=

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Submitted: 10/30/2012
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Comments(36):

[ 36 comments ]
What do you think? Give us your opinion. Anonymous comments allowed.
#1 - jayzerhaze (10/30/2012) [-]
Mfw
#12 - sidathon (10/30/2012) [-]
Well 			*******		 done, you broke physics. God needs to sort this one out in patch 6.6.6
Well ******* done, you broke physics. God needs to sort this one out in patch 6.6.6
User avatar #14 to #12 - thecheesebread (10/30/2012) [-]
where is this from again, ive seen the video but i cant remember what its called, hlps needed pls
#19 to #14 - Rascal (10/31/2012) [-]
search google for "laeffy"
User avatar #35 to #19 - thecheesebread (10/31/2012) [-]
cheers annon
User avatar #15 to #14 - sidathon (10/30/2012) [-]
I got no clue where this is from :D
#8 - skwaab (10/30/2012) [-]
Genuine "wut"

Seriously.
This has made me re-evaluate my life.
User avatar #28 - mullacllahdoow (10/31/2012) [-]
It wouldn't look quite so impressive if we weren't seeing it at a fixed frame rate, it's similar to the effect that watching a recorded tyre has (at certain speeds it looks like it's not moving/turning backwards) the sound wave makes the water flow irregular, and so if the camera frame rate is 60fps then there is a water drop in that location every 1/60th of a second for the "froze in mid air effect".

For the time when it was going in reverse, it was falling just a little slower than that, so the next drop was slightly above the previous, but it looked like the same drop going backwards.
User avatar #36 to #28 - Itsgoodenough (11/04/2012) [-]
Film or animation student?
User avatar #37 to #36 - mullacllahdoow (11/04/2012) [-]
No... Mathematics Student, interest in physics though, guess that's where it came from.
User avatar #29 to #28 - thenameguy (10/31/2012) [-]
dammit I thought that I could be the smart one and explain :D:D
User avatar #31 to #29 - mullacllahdoow (10/31/2012) [-]
heh, sorry dude =) have a thumb anyway
User avatar #25 - talkingmouth (10/31/2012) [-]
the patch is coming out 21.12.12
+2
#11 - itsmypenis **User deleted account** has deleted their comment [-]
User avatar #9 - sanditroll (10/30/2012) [-]
This effect is probably possible only with a camera i dont think it would look like this in person. This is probably due to the frequency corresponding in a way with the cameras framerate. the same effect can bee seen when a helicopter is filmed , sometimes it looks like the blades are just standing still.
User avatar #20 to #9 - epiclyFAiL (10/31/2012) [-]
The camera itself is recording at a rate of 24 frames a second, which is why it appears to be staying still, and at the 23 sine wave, the rate of the camera (in frames per second) is greater than that of the wave, it appears to be sucked back in the tube.

You were right, I was just re-wording it.
User avatar #22 to #9 - kerfufflemachtwo (10/31/2012) [-]
It would be possible to see it with your eyes, but probably at a different frequency. I forget what the average frame rate of the human eye is.

A similar effect is when you see a car on the highway, and the pattern on the wheels seems to be spinning backwards.
#34 - slickwilly (10/31/2012) [-]
"huuuuuuh?"

I came to fix physics. but..
User avatar #33 - yourdownfall (10/31/2012) [-]
Mythbusters time?
User avatar #27 - darktoucan ONLINE (10/31/2012) [-]
there is no way this can work unless its an optical illusion
User avatar #24 - Maroon ONLINE (10/31/2012) [-]
so is it an optical illusion?
User avatar #30 to #24 - lexivex ONLINE (10/31/2012) [-]
Kinda. It's because of how cameras work. If you were seeing that in person, in wouldn't look like that
#23 - fpsnoob (10/31/2012) [-]
And here I was, feeling pretty confident in my understanding of how **** works. Way to take a **** on all my hopes and dreams op
User avatar #18 - chaossniper (10/31/2012) [-]
its like a strobe
#17 - blueskull (10/31/2012) [-]
Mind fully ****** at reversed water
User avatar #13 - ticticboom (10/30/2012) [-]
life is a discontinued program
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