View allAll Photos Tagged pendulum
A swinging light produces amazing patterns. Pendulum art exemplifies the beauty of the laws of physics. At least two physical laws are evident here: one, uniform oscillation of a pendulum, which can be described by trigonometric functions, and the Second Law of Thermodynamics, which ensures that the motion will decay as kinetic energy is transferred to heat through friction and air resistance. As the axis of the swing precesses, it creates the illusion of a net-like fabric folding back on itself in 3-D.
While I'm on indoor diversions, I thought I would post this time exposure I shot 41 years ago and didn't think of scanning till yesterday. When 35mm photography was a new hobby for me in 1968 (I'm revealing my age), I was keen to experiment on things. I read somewhere about how you could produce intricate art like this with a flashlight, some string, and a camera.
So I placed my Argus rangefinder camera on my bedroom floor, and attached a small flashlight to a string on the light fixture. I turned off the lights and started the light swinging in an oval, then opened the camera shutter and recorded the resulting pattern. Back in those days, you had 24 exposures of Kodachrome per roll (we are so spoiled with 8GB memory sticks now). Then you had to wait a few days to get it developed and pay over $5 for that plus the price of the film.
Naturally, I was excited about the results and tried more experiments. I used colored filters on the light and tried several swings of different magnitudes, and other tricks. Some worked well and others didn't. I probably shot about a couple dozen different pendulum art exposures that year, then gave it up and never tried it since. This three-color triple exposure came out pretty nice I think.
Another example has been posted here.
Ben "The Verse" Mount of Pendulum @ Provinssirock 2011
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[Ophioderma pendulum subsp. falcatum]
Puapua moa or Adder's tongue
Ophioglossaceae
Indigenous to the Hawaiian Islands (all main islands)
Oʻahu (Cultivated)
Hawaiian name: Puapua "tail feathers" and moa, "chicken," lit. "chicken tail feathers."
Early Hawaiians prepared a cough remedy from this fern. Its spores were given to infants after birth to purge them of meconium.
Closeup
www.flickr.com/photos/dweickhoff/13853636073/in/photolist...
Etymology
The generic name Ophioglossum is from the Greek ophis, snake, and glossa, tongue, in reference to the fertile spike resembling a snake's tongue.
The Latin specific epithet pendulum, hanging, in reference to this species' drooping blade.
Eight different lengths pendulums create waves. If you like this model please add your support on LEGO Ideas page ideas.lego.com/projects/723b9502-862f-4ec7-9efe-9a61ab24d72a
Looking down from the 3rd level at Sunnyside Memorial Gardens onto a Foucault Pendulum, one of the largest of its kind and said to be one of only two in Southern California. It keeps accurate time making one complete revolution every 42 hours and 48 minutes while demonstrating the rotation of the earth.
[syn. Ophioderma pendulum subsp. falcatum]
Puapua moa or Adder's tongue
Ophioglossaceae
Indigenous to the Hawaiian Islands (all main islands)
Oʻahu (Cultivated)
Hawaiian name: Puapua "tail feathers" and moa, "chicken," lit. "chicken tail feathers."
Habit
www.flickr.com/photos/dweickhoff/13853610635/in/datetaken...
Early Hawaiians prepared a cough remedy from this fern. Its spores were given to infants after birth to purge them of meconium.
Etymology
The generic name Ophioglossum is from the Greek ophis, snake, and glossa, tongue, in reference to the fertile spike resembling a snake's tongue.
The Latin specific epithet pendulum, hanging, in reference to this species' drooping blade.
The Foucault Pendulum tends to swing on the same plane while the Earth rotates on its axis underneath it. Thus, to an observer on the Earth, the pendulum appears to gradually change its direction of swing, and in so doing it knocks over a little wooden block about once every five minutes.
Pendulum
Cleveland Museum of Natural History
As the pendulum swings during the day, it rotates because the Earth rotates. It knocks down the dominoes as the day progresses.
Here's another one of my experiments with swinging light pendulum painting. You never knew quite how they would turn out till you got the film processed. I must have bumped this one slightly during the exposure. Scanned from a 35mm slide.
For today's Photogamer task, "Motion," I decided to look up and write out the equations for the physics of a swinging pendulum.
I did this, in part, because I'm reading Foucault's Pendulum by Umberto Eco and I love the metaphors he's able to able to create with physics and math.
Having the "perfect" motion of the pendulum on the page before you does leave you a little in awe of everything. :)
100x.7
polaroid i2
i-type film
black and white
This another ongoing project I am doing revolving around time. All of the images for this project are now in a new form. The emulsion is lifted and placed onto a different surface. Most of the images look different as tears, rips, wrinkles and other mishaps naturally occur in the process.
This gorgeous Foucault pendulum is located in one of the foyers of the Portland Convention Center. The Foucault pendulum demonstrates the axial rotation of the Earth, because the pendulum makes a full rotation of the circle every 24 hours.
Where most Foucault pendulums knock over pegs to demonstrate that they have made the full circle, this one taps brass discs which raise the tapered brass rods (the ones disappearing into the upper right in this photo). The single brass tapered rod extending down from the upper left corner is one that has not yet been knocked over.
I love the fact that this is the only Foucault pendulum that I've ever seen which is mounted above the viewer's head, leading to this incredible photo with the foyer of the Convention Center reflected in the highly polished surface of the pendulum's sphere.
A wider shot of the entire ring of the pendulum can be found here.
A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.
street - close to the center of the city - afternoon - Lanzhou, Gansu, China
I assembled LED to the tip of double pendulum.
This is a "real" chaotic orbit and this is NOT the computer graphics!
High-performance double pendulum vid is here.
I am unclear on what scientific fact I was learning here.* Something about executive desk toys, maybe.
*That could pretty much be the caption for every picture I took at the Exploratorium.
Meta.
Taken from my window. It's the field below my flat with the silhouettes of a tree and a lamp post.
Thanks for the comments, everyone!
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