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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=

+248
Views: 12281 Submitted: 10/30/2012
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[ 36 comments ]
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20 comments displayed.
#1 - jayzerhaze
Reply +17
(10/30/2012) [-]
Mfw
#2 - avastbluesky
Reply +13
(10/30/2012) [-]
#12 - sidathon
Reply +12
(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
#14 to #12 - thecheesebread
Reply +1
(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 - anon
Reply 0
(10/31/2012) [-]
search google for "laeffy"
#35 to #19 - thecheesebread
Reply 0
(10/31/2012) [-]
cheers annon
#15 to #14 - sidathon
Reply 0
(10/30/2012) [-]
I got no clue where this is from :D
#8 - skwaab
Reply +5
(10/30/2012) [-]
Genuine "wut"

Seriously.
This has made me re-evaluate my life.
#28 - mullacllahdoow
Reply +3
(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.
#36 to #28 - Itsgoodenough
Reply 0
(11/04/2012) [-]
Film or animation student?
#37 to #36 - mullacllahdoow
Reply 0
(11/04/2012) [-]
No... Mathematics Student, interest in physics though, guess that's where it came from.
#29 to #28 - thenameguy ONLINE
Reply +1
(10/31/2012) [-]
dammit I thought that I could be the smart one and explain :D:D
#31 to #29 - mullacllahdoow
Reply +1
(10/31/2012) [-]
heh, sorry dude =) have a thumb anyway
#7 - erdbeerbaum
Reply +3
(10/30/2012) [-]
#25 - talkingmouth ONLINE
Reply +2
(10/31/2012) [-]
the patch is coming out 21.12.12
#11 - itsmypenis **User deleted account**
+2
has deleted their comment [-]
#16 - gnubais
Reply +1
(10/31/2012) [-]
#9 - sanditroll
Reply +1
(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.
#20 to #9 - epiclyFAiL
Reply 0
(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.
#22 to #9 - kerfufflemachtwo
Reply 0
(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.