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WOah…
wait, is this possible?
is called physics
What is this? :O
Lol, Its the Devil’s work…
I bet the neighbor’s dog peed all over himself.
lol
IDK about dogs, but this pissed my bird off SO BAD! Hes still squawking like someone pulled his tail feathers out. =/
IDK about dogs as well, but my cats sure freaked out. They both woke from a sound slumber and started chasing imaginary flies.
Ow, my ears! I had to mute the video about halfway through. Interesting that the higher the frequency, the more complex the pattern the rice made.
The higher the frequency, the shorter the waves. The grains rest along the nodes so, shorter waves, more nodes present along the surface. This visualization is pretty keen.
woww, you say smart things, with words.
Because higher frequency = shorter wavelength.
Raising the frequency of the sound has an effect similar to raising the resolution of the surface. In other words, larger surface areas would be needed to see the same complexity of the lower frequencies, but they’re all fairly complex patterns.
Also keep in mind that the shape, medium, and size of the surface is quite important too. If they would have found the fundamental resonance of the surface and then added the harmonic resonances, they would have seen MUCH more complex shapes.
This is Faked. They arranged the rice and put sound over the video. Sound waves don’t do this.
wow, you sound pretty confident for someone who knows nothing about sound waves.
Wrong. The rice is collecting in the nodes of the standing waves that are occurring at the resonant frequencies of the steel plate. The reason you do not see a constantly morphing shape is due to the restriction of resonant frequencies in a steel plate.
Try getting an education in acoustical physics or even a music degree. What you are seeing here are the harmonic resonances of the steel plate (overtones).
Yeah, and Paul Revere rang the bells to warn the British not to take our guns.
Yeah, and Rebecca black is a good singer.
I’m pretty certain he fired the guns to warn the British not to take ring your bells, ok? I mean, it was too early in the morning.
GOTCHA.
They have to be related.
Brilliant illustration of this idea: http://opinionator.blogs.nytimes.com/2010/06/20/the-anosognosics-dilemma-1/
What the heck is in our oxogen supply? The visible spectrum is rainbows?
What the hell is wrong with you? That is the important question.
It’s light, reflecting off of water vapor. Did this person ever go to grade school??
It’s light, REFRACTING through the water DROPLETS.
Did this person just correct and insult somebody else when they, themselves did not know that water vapor is the gaseous phase of water (colorless and lighter than air), and not just airborne drops of water; as well as the fact that a rainbow occurs after refraction of light, not reflection?
yeah! Just like the moonlanding and the killing of Bin Laden!
It’s all a conspiracy! They want us to believe this weird patterns! Go figure! Thankfully we are wiser!
You’re right: sound waves don’t do this. But, the vibrations that create said sound waves do. Throw some rice on your speakers and turn them up and you’ll see them dance around too. Now make your speaker near flat and tune through the frequency and the vibrations will cause nearly what you see here. It’s a simple experiment.
And now, for those who don’t know:
A speaker works on a simple principle: in order to have sound, you have to move the air. So a simple speaker is nothing more than a electromagnet, a permanent magnet, an air cushion, and a vibration matrix (usually a cone of paper board). The electromagnet forces the cone to move back and forth creating the the vibrations in the air which produce sound. Yey. (Yeah so this is a very simplistic explanation written from my own head. If you want a better understanding then use google.)
“You’re right: sound waves don’t do this. But, the vibrations that create said sound waves do.”
You just completely contradicted yourself. Sound is a pressure wave/vibration in a medium. So yeah, sound waves DO do this.
Wrong. The rice is collecting in the nodes of the standing waves that are occurring at the resonant frequencies of the steel plate. The reason you do not see a constantly morphing shape is due to the restriction of resonant frequencies in a steel plate.
Try getting an education in acoustical physics or even a music degree. What you are seeing here are the harmonic resonances of the steel plate (overtones).
Its not faked but the guy who uploaded the video had no idea what it was of. I’ve done this exact experiment. Its a metal plate, not a speaker. Harmonic vibrations are applied at the center of the plate. At certain frequencies, parts of the plate stop vibrating. Its called resonance. Its at these locations that the rice settles and gives a pattern. So no, its not sound waves making the patterns but the shape of the plate itself determines which patters will be created. Google “mode shapes” or “natural frequencies” if you are interested in finding out more.
Intelligence fail. They are called Chladni patterns.
http://en.wikipedia.org/wiki/Ernst_Chladni
The universe really is just that d@mn cool.
not faked, they had an experiment just like this at a science museum I went to. definitely real.
Actually, sound waves do this. They had a display at the Boston Science Museum when I was little that showed a board of wood, a string, a bow, and a bunch of sand. Nobody knew what to do with it, so the schoolkids all ignored it… until my father led us up to it and stopped.
He spread the sand evenly on the board and told us to watch. Using the bow, he drew a pure note from the string (like playing a violin), and the sand vibrated into a pattern. He reached out, held the string at half height, and bowed a note one octave higher. The sand resettled into a more complex version of the same pattern. He played with thirds, fifths, and their octaves, and by then he’d unknowingly drawn an entire crowd of various school groups to watch in amazement. (He’s a music guy, he knows his string intervals and can get any note just by pinching the string at the right proportions.)
That’s the kind of memory that sticks in your mind. When I saw the video, I was more interested in the types of patterns and how they only solidified when the note purified. It happening in the first place was no surprise to me at all.
actually, it’s not faked. and also it’s not the sound waves that are directly making the rice jump into patterns like that. the sound waves are exciting the plate/surface that the rice is on, and the excitation of the surface causes the rice to move into patterns. and the very distinct patterns of rice occur at the plate/surface’s various modes of vibration. in between these modes of vibration, the rice is just kind of in a mess. it’s science. not fake.
So then it was the sound waves that did it. You realize sound is just an oscillation of a medium, right? It can be air, wood, steel, water… anything that has mass.
Thank [insert imaginary omnipotent being here]. There are intelligent people here!
you sir are a complete tool
Its not rice, its sugar. And its not a speaker, its a metal plate. And its not sound waves making the patterns but harmonic vibrations. I did this exact same experiment last year at university where I had to find the mode shapes of the plate at different transient frequencies to determine the plates’ natural frequencies. The places where u see the sugar pattens are where the plate is not moving. the rest of the plate is vibrating and bouncing the sugar off.
You are an idiot. Vibrations are sound waves regardless of the medium. And unless the video specified what the visualization medium was, it could very well have been rice.
Sound waves are not vibrations. They are pressure waves.
And this recording is from my university. they used salt or sugar
Seriously, did they use a pair of oven mittens to tape this with? What the hell?
Seriously? Did they use a pair of oven mittens to tape this with? My old GameBoy Color has a better resolution then that…
This is several years old. I saw it about 4 years ago for the first time.
Oven mitts? XD LOL that is the weirdest… just… IDK why that makes me so giddy
looks more like the Shamwow 500, oven mitts dont have alot of recording time.
^ This.
My brain (and my ear drums) exploded.
Tic-tac-toe at 1:45.
let me guess…. they used a rice cooker to film this.
It’s a chaldni plate. That’s likely salt or sand, not rice.
Yay for physics demonstrations!
http://www.mip.berkeley.edu/physics/B+55+05.html
my kitty went crazy with this video… the poor baby almost started crying D=
I agree. The video looked….. grainy.
When/if my hearing returns, remind me to award you your Internets.
nice one.
Never noticed it before, but so much of those patterns looked like the old Dr Who intro (back in the Jon Pertwee/Tom Baker years)! Probably where they got the idea from (for the intro that is).
MY EARS, THEY BLEED!!!!
Funny to see every time ;D
Its a common experiment for physics students…
Hope its a joke that some people believe this is fake..
For interested people:
http://en.wikipedia.org/wiki/Ernst_Chladni#Chladni_plates
https://lp.uni-goettingen.de/get/text/3801
I saw this on youtube YEARS ago, under the title “Resonantie” if I’m not mistaken.
This is a standard demonstration of standing waves in a two dimensional surface. The pattern depends on the shape of the plate and the frequency driving the vibrations. Here they are probably driving it using magnetostriction, but I have seen versions in “discovery” type museums where they have differently shaped plates, sand to put on top of them, then you stroke the plate with a violin bow. Do it right and you get a standing wave pattern. Waves on a string form standing waves too (the notes on a guitar, violin, etc.) Change the length of the string by fretting and you get a different frequency standing wave. Worth noting that all of these are resonances of the materials.
Want to have some REAL fun making some standing waves? Go to someone’s house who has a circular above-ground swimming pool. Get in the center with a beach ball and start slowly moving it up and down in the water at the surface (partially submerging it.) Vary the frequency and pretty soon you will have a standing wave that will be HUGE, sending large quantities of water over the edge. Vary the frequency and get different standing wave patterns (at least two are easy to make.) Move halfway out to the side of the pool and try again for a completely different set of wave patterns. Note: if you get too carried away, you very well could destroy the pool, so you are on your own here; I take no responsibility for property damage or injuries. This is the same method used in a lot of wave pools via a mechanically driven ball. We did a similar thing when I was a kid in big swimming pools (rocking the pool) by having a continuous line of kids jumping off of the board at the right frequency. We could splash so much water out of the pool that the lifeguard would yell at us
Physics is phun!
Rice: How does it work?
Well, actually, in this case, an oscillating magnet (moving a diaphragm).
this is called “cymatics” look it up if you think its fake!
its the same thing they do with the liquid magnets
Only instead of rice, it’s your neurotransmitters. And instead of sound waves, it’s gamma radiation! –Farnsworth
Precisely this not illustrates the sound wave itself but the eigenvalues of the plate the sand is put on. It would look different if you take a circular plate or even just a thinner one.
I’m not sure by 100% but what we see should be representable by the zero set of a Bessel-function.
Holy jesus christ on toast. Amusing video but I think my hearing will be gone for an unknown amount of time.
and thats why science is cooler than religion :3
+1
+100
+1000
+9001
+10000
C-C-C-COMBO BREAKER!
maybe that’s how crop circles are made…o_o
Not fake. It depends on the resonant frequencies of the square membrane. The rice collects around the nodes. Search “natural modes circular membrane” for an example of what they look like. The higher modes can be quite bizarre.
ouch….ouch
my dog jizzed himself, imediately after he bit my leg.
Was this recorded with a potato?
This video is not faked. I know because I made it while I was in charge of the physics demo lectures at Wake Forest University. Here is the original video. http://www.wfu.edu/academics/physics/demolabs/demos/
It is not rice, but sand that is settling into the nodes of the standing waves created in the plate by mechanical waves. The mechanical waves are created by an oscillating speaker cone with a post attached to it. When you change the frequency of the sound going into the speaker, you change the frequency of the mechanical wave. It’s called a “mechanical wave driver” and is from PASCO. http://store.pasco.com/pascostore/showdetl.cfm?&DID=9&Product_ID=1593&groupID=283&Detail=1
The setup is using a square Chladni plate. Different shaped one can be found (look around PASCO). Different plates create different patterns. This plate is driven in the center. If you drove it somewhere else, you’d get different patterns. So, frequency, shape and diving place all affect the patterns you get out.
Amazing!!
sh*t that effin noise!!!
i have a splitting headache, i cant see but somehow i have a raging hard on.
Inspirational – these pattern look like minimaps of interesting and valid maps for any RTS-type game. And yes, I play too much.