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Electromagnetic Emission Art

mr_lithic writes "The artist Richard Box has used the electromagnetic field generated by overhead transmission cables to power 1300 fluorescent lightbulbs positioned underneath. Some pictures available. Professor Denis Harshaw at Bristol University explains "There's an interactive element to all this, too, for those who go to the site itself. 'You affect the lights by your proximity', explains Richard Box, 'because you're a much better conductor than a glass tube. And there's sound as well as light - a crackling that corresponds to the flashing of the lights. There's a certain smell too, and your hair stands slightly on end.'" Sounds cool and it is on until February 29th. Directons here."

44 of 198 comments (clear)

  1. The technology is going to kill us by FePe · · Score: 4, Informative
    This is what the future is going to be like.

    Yeah, yeah chips in your hair. 2000.

    A3 x 30. Taken in the studio this series of photographs depicts the artist fending off a swarm of silicon chips as if they were flying insects. The work deals with the effect, intended or not, of technology on the individual.

    --
    "Until you do what you believe in, how do you know whether you believe in it or not?" -- Leo Tolstoy
  2. Wrong physics by Anonymous Coward · · Score: 5, Interesting

    The bulbs will be 'planted' across the site at the foot of an electricity pylon, and will pick up the waste emission from the overhead power line.

    Not really. Lighting the bulbs most certainly reduces the power on the lines. The inductance of the power lines change because of the presence of the bulbs.

    1. Re:Wrong physics by Anonymous Coward · · Score: 5, Informative

      Its called mutual inductance. The changing magnetic field in the power lines causes a changing magnetic field in the 'pylons'(which are most likely a coil oriented correctly). This causes a current in the coil due to Faraday's law. This current itself then generates its own EMF which Lenz's law then shows will have the opposite polarity of the power line magnetic field. Thus, this new magnetic field attempts to generate a current in the opposite direction in the power lines, increasing their resistance.
      In short, he's using the power companies' power to light his bulbs. There are no 'waste emmisions'.

    2. Re:Wrong physics by Doug+Neal · · Score: 4, Insightful

      They are both interdependant, you can't have one without the other. Mutual inductance will most definitely be happening in this case. It's all about conservation of energy as well - if all the energy that's going into lighting up those bulbs was just being radiated out and wasted anyway, don't you think there'd be a hell of a lot of energy going to waste? There is some loss on power transmission lines but it's not as much as that!

    3. Re:Wrong physics by smchris · · Score: 5, Funny

      So the moral is: instead of tin hats, people who live under power lines should coat their houses in light bulbs?

    4. Re:Wrong physics by Dolphinzilla · · Score: 3, Interesting

      Your correct - the tubes light because the electric field excites mercury ions inside the tube - AND energy that the tubes use is NOT free, the tubes with their little pins all sticking in the air create lower impedance paths to ground for the energy in the power lines to bleed off to - that is the points creates a high distribution of electrons tha nthe surrounding area and thus a high voltage.

    5. Re:Wrong physics by Dolphinzilla · · Score: 4, Interesting

      Being a true EE geek I have built a dozen or so various Tesla coils in my life (from a paltry 60,000 volt unit up to a 250,000 volt baby) these units would light up a flourescent tube with ease from 10 to 20 foot away - I have also lit tubes in front of very high power x-band radars (kids DO NOT try at home) - The basic prinicples and physics are the same for high tension power lines although the frequencies involved are lower. So yes, I do know what I am talking about....

  3. Science and Art by apirkle · · Score: 5, Interesting
    I think it's very interesting that the artist, Richard Box, is an artist in residence with the Physics department at the University of Bristol.

    It's cool to see art and science actively collaborating. From the article:

    The Physics Department at the University of Bristol has played host to a number of artist residencies. In 2002 artist, Richard Box was awarded a Leverhulme Grant to become the department's third artist in residence. Whilst the starting point for other artists have varied, Richard's main interest was in the specialist glass blowing workshop that is integrated alongside the rest of the physics research activities. His interest in glass has always required him to have objects made by others, this residency offered him the chance to begin to learn how to develop his own glass blowing skills and so have greater authority over his own work.
    1. Re:Science and Art by colmore · · Score: 4, Interesting

      I think it's really interesting that the physics department over there seems make this sort of thing a habit. Universities are so often extremely tight penny penchers, I'm impressed that someone was able to convince the bean counters that this is worthwhile.

      I think the sculpture itself is really pretty, it reminds me of De Maria's Lightning Field, another large scale installation that uses the surrounding environment.

      --
      In Capitalist America, bank robs you!
    2. Re:Science and Art by jrockway · · Score: 4, Informative

      OK. Done. I emailed them this message:

      To: rights@diaart.org

      Hello. I recently happened upon your page for "The Lightning Field". I
      was curious about how you could protect your metal poles from being
      photographed by copyright law. Copyright law prevents the
      redistribution of one's original work, but not the creation of new
      work. If I sold pictures that you took, I would be in violation of your
      copyright. Unfortunately, there is no law that prevents me from
      photographing anything.

      If there were, perhaps you would consider suing Microsoft and the USGS
      for the infringing aerial photograph at
      http://terraserver.microsoft.com/

      On second thought, perhaps you shouldn't consider that. Because if you did, you would be laughed out of court.

      Sincerely,
      Jonathan Rockway

      --
      My other car is first.
  4. free power by mistered · · Score: 4, Interesting
    This technique of using the field from high voltage transmission lines has reportedly been used by farmers to power lights in a barn or electrify a fence as this anecdote suggests. The power utilities supposedly have gone after those using the "free" power. I'm not sure how truthful any of these stories are though.

    Also, check out some of his other art. "A rotating, pulsating, elevating, sound and movement activated, life-size neon brain." Now that's just strange.

    --
    Enjoy your job, make lots of money, work within the law. Choose any two.
    1. Re:free power by Hao+Wu · · Score: 4, Interesting
      Isn't this what the Navy used to spy on Soviet sea cables?

      ref: Operation Ivy Bells

      --
      I suggest you read Slashdot
  5. directions by Anonymous Coward · · Score: 5, Funny

    What? No GPS coordinates?

  6. Here in the Philippines by digitalchinky · · Score: 5, Interesting

    I toyed with ideas of free lighting (living close to high tension power lines)... seems a little pointless considering thousands of locals run jumper leads of the damn things anyway, with complete immunity from Meralco (Elec company)

    Easier to jumper someone elses jumper leads anyway.

    1. Re:Here in the Philippines by mistered · · Score: 3, Interesting
      One of my friends had some trouble with his underground power connection. The utility inspected it while he was at work, and phoned him and told him they'd need to jumper his neighbour's power. When you're used to jumpers being little plastic caps that go over .1" spacing header pins, it's a little bit of a shock to come home and see a trio of 1/2" wires coming out of your meter, tied to the fence, and then running into the neighbour's.

      --
      Enjoy your job, make lots of money, work within the law. Choose any two.
    2. Re:Here in the Philippines by HPNpilot · · Score: 3, Informative

      Nobody is running jumper leads to multihundred kV transmission lines. That would be outrageoulsy dangerous and difficult to do.

      Even attaching to a 7 kV local HT line is beyond what most people could survive doing unless they were EXTREMELY lucky and had a decent amount of knowledge.

      STAY AWAY FROM THESE LINES. NEVER NEVER NEVER ATTEMPT TO ATTACH TO THEM. DON'T EVEN THINK ABOUT IT. SERIOUSLY!

  7. Stealing energy by Rosco+P.+Coltrane · · Score: 5, Interesting

    The artist Richard Box has used the electromagnetic field generated by overhead transmission cables to power 1300 fluorescent lightbulbs positioned underneath

    Technically, he scoops out energy from overhead lines. True, it's insignificant, but still he could be charged with theft. Of course, since it's art, I doubt anybody at the power company will say anything, but I wouldn't be surprised if they told him to take his art somewhere else.

    A well know, similar "application", was demonstrated when wireless transmission technologies boomed in the 30s in Paris : the first antennas had been installed on top of the Eiffel tower and were putting out dozens of kilowatts. Some smart guy started selling battery-less flashlights under the tower, and a lot of gullible people bought them, amazed that they indeed created light magically without batteries. Little did they know the magic flashlights had a little coil inside that used the Eiffel tower antennas' HF power to light up the bulb, and therefore could only work under the tower. The flashlight seller was eventually caught and, far from being charged for scamming people, was charged for stealing TDF (French wireless authority) energy, which was apparently much worse.

    But anyway, pretty cool art I say. The cows in the field nearby must have fun watching that every night.

    --
    "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    1. Re:Stealing energy by Rosco+P.+Coltrane · · Score: 5, Informative

      Whatever sucking up EM fields is, it sure isn't theft, no matter what the french say

      You shouldn't have slept through your EE classes.

      Having a coil under the Eiffel tower is exactly similar to having a secondary coil in a transformer : whenever you have a load drawing current on the secondary coil, the primary coil (in this case, the Eiffel tower's antennas) have to provide that power, despite the fact that there's no physical connection between the 2 coils. So if you have antennas putting out 50kW and a coil drawing 10W nearby, that's 10 less Watts in radio power.

      This guy's art also draws energy from the power line. The tubes don't light up for free do they?

      But I'll tell you what : if sucking up EM fields isn't theft, tell me where you live and I'll coil a long copper wire around a mile-long stretch of the powerline that goes to your house and power my trailer with it. I'm sure you won't mind the higher bill from the power company in your mailbox, since I'm not stealing anything...

      --
      "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
    2. Re:Stealing energy by BroncoInCalifornia · · Score: 3, Insightful
      I can see this scenario:
      Farmer who lives close to power line makes some big coils to nab some of the energy in the air around his house.

      Power company: You are stealing our power. Stop.

      Farmer: What are your E fields and H fields doing on my property. Get them off or let me use them as I see fit.

      ...

      This could turn into quite a pissing contest!

      --

      Religion is the main cause of atheism.

  8. Re:electromagnetic waves kill also brain cells by DarkHelmet · · Score: 5, Funny

    Yeah, at least if you're gonna kill your brain cells, do it with something fun like booze, pot or ecstacy.

    Like the Joker says, "If you gotta go, go with a smile!"

    --
    /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i
  9. At last, an event near me! by Chilliwilli · · Score: 5, Interesting

    Will be headed out there with a camera ASAP. Perhaps local /.ers should arrange a meeting time and all go at once.

    --
    Cure cancer.. and stuff! www.team45.info
    1. Re:At last, an event near me! by Anonymous Coward · · Score: 3, Funny

      Physical slashdotting? There's a new idea.

  10. Re:Stealing or not? by Rosco+P.+Coltrane · · Score: 5, Informative

    Does arrangements like that actually "steal" any power from the powerlines, or would it be lost anyway if it was just air instead of neon tubes?

    They do draw energy from the line. If they weren't there, the voltage differential in the static field would stay high and no (or little) current would be sinked into the ground under the tube.

    Another proof: assume each tube spits out the equivalent of 10W in light, there must be like 1000 tubes in that field, so they burn about 10kW all the time. I don't think the ground underneath normally sinks 10kW for each 100mx100m square : if it did, it would heat up, and very long lines would lose so much power over the distance that they would bankrupt the power companies.

    --
    "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
  11. Theft? by DAldredge · · Score: 5, Funny

    Is this theft? I ask because in the past, before the current overkill laws againts computer crime, crackers where charged with theft of electricy. Could he be charged?

  12. Edible Electromagnetic Emission Art by G4from128k · · Score: 5, Informative

    Microwaving chocolate is a fun way to both measure the speed of light and get some edible artifacts of the patterns of the electromagnetic fields inside a microwave oven.

    --
    Two wrongs don't make a right, but three lefts do.
  13. Power Lines have links to other Negative Effects by MidiSaxMan · · Score: 5, Interesting

    Growing up on a farm, I have learned of the negative effects "stray voltages" cause to farm animals.

    This is often linked to the power return to the station. Everywhere, electrical service has everything connected in relation to ground, with any difference in the power balance of the phases of power taking a different path back to the source of the power, i.e. the ground itself, and potentially through anything in its path.

    This "stray voltage" manifests itself when animals, with 4 bare hooves, paws, etc. touching the ground, detect small but irritating (to varying degrees) levels of current taking an alternate path back to the source. Animals have also been proven to have a higher sensitivity for detecting stray currents as well, compared to humans.

    Often in cases, to the power companies defense, they will come out to do a check on the premises, and often do find a problem in the local, on-farm wiring, potentially causing the problem.

    Unfortunately, in the cases of newer farms where all the wiring is new and up-to-code, a stray current is often traced to off-the-farm sources, for example, a newly-installed High-voltage Power Line.

    --

    Do Not Accept Defeat; Believe in your Dream. --me
  14. Reconfigure the Lines by Anonymous Coward · · Score: 3, Informative

    The power company deserves to have their power stolen because they are too cheap to reconfigure their lines to reduce the electromagentic output:

    http://tdworld.com/ar/power_line_designs_reduce/

    1. Re:Reconfigure the Lines by cperciva · · Score: 3, Insightful

      Let me guess: People deserve to have their cars stolen because they are too cheap to install expensive anti-theft devices?

      Or is it only large corporations which deserve to be stolen from?

  15. Re:electromagnetic waves kill also brain cells by Anonymous Coward · · Score: 3, Insightful

    pot doesn't kill brain cells...cops beating you over the head because you have some does.

  16. Re:Electricity fun by etLux · · Score: 5, Funny

    Well, I liiim, er, lvoplx, er, liiivee unnnder pwoer liens, and n-n-n-othin gggg has has has has has has has has [thwack thwack] huppened two too to MY brain.

  17. Re:Stealing or not? by gordguide · · Score: 3, Insightful

    He is using a source of energy, and translating it into work.

    The source of energy is clearly owned by an identifiable person or group. Therefore the use of that energy is actionable. The right-of-way that allows the powerline in the first place gives the power company further arguments to strengthen their position.

    The amount of energy used is measurable. Therefore he could be billed for it. Need I go on?

    A smart Power Company would probably like it all to just go away, because it raises the possibility of health issues, so making a big deal out of it probably isn't a good idea.

    Then again, a smart law firm that senses an opportunity to bill a few hours might convince a gullible board to pursue it. There are plenty of reasonable arguments that could be offered to encourage them to re-affirm rights over the use of borrowed power in this fashion (even though those rights are well established already). Companies don't always do what is in their best interest.

    If it becomes popular or more common (negating the value of shutting up about it) expect to see the lawyers get a call.

    As a final note: consider that the actual means to use the power is irrelevant; just because it doesn't directly connect to the grid means nothing, now that it's proven it's not necessarily a prerequisite to using the energy in the first place. it's just a technical detail.

  18. Or illegal emissions? by tjstork · · Score: 4, Interesting

    I think the piece is more of an artistic rebuttal of the assertion that these high energy transmission lines are safe for humans and animals.

    If you've got an EM field that is powerful enough to light up 1000 light bulbs, it seems intuitive that there is enough energy to cause harm to humans living at similar distances.

    --
    This is my sig.
  19. Reminds me of school by panurge · · Score: 5, Interesting
    This is a true story. I was there, I saw it.

    Our physics teacher was using the Van der Graaf for an experiment (in fact, he was intending to measure the current it produced). Over the demonstrator's bench, a fluorescent tube was flickering. He got annoyed. He climbed on a stool to remove the offending fluorescent.

    You can guess the rest. The remote end of the tube dropped towards the van der Graaf. About 10cm from the dome, there was a spark. The dome discharged through the tube, which flashed, the physicist, and the stool. Most impressive.

    The tube survived falling on the bench. We learned several things from this:

    • Contrary to belief, our teacher knew the f-word.
    • The current was actually so small, as it had to pass down a wooden stool, that he was unhurt.
    • Given enough volts, wood conducts.
    --
    Panurge has posted for the last time. Thanks for the positive moderations.
  20. It seems people have been sued for this by enosys · · Score: 4, Interesting
    A while ago I searched for info about this sort of thing online. It seems that farmers using fences or long wires to get power have been sued for it. I've even read about people who lived close to high power transmitters running fluorescent tubes from small antennas and being sued for it. This is mainly just from usenet posts but I feel there's enough info out there to show that at least some of this was real.

    I also remember one of my high school teachers talking about how he used to work for hydro and look for this sort of thing while flying in a helicopter and inspecting power lines.

    Really it shouldn't be that hard to find this sort of thing. You can just use a time domain reflectometer, and power companies have these for finding cable faults.

    1. Re:It seems people have been sued for this by MemoryAid · · Score: 3, Interesting
      Okay, you got me with the "time domain reflectometer." That sounds like something Professor Frink might mention on The Simpsons.

      Seriously, though, how about a little detail on what that does? I suppose I could Google it, but here's my guess:

      The device measures the distance along the line to an increased area of inductive load by timing the reflection of a signal from that part of the line. The helicopter then flies out that far and looks for an antenna.

      Here's another question: Why are British power companies referred to as 'hydro?' Is hydro-electric the default method of producing electricity there? Or is power transmitted around the country using high pressure hydraulic lines and then converted to electricity on site? :-)

      These questions keep me awake at night (briefly).

      --
      Language students: Don't try to learn English here. This ain't it.
    2. Re:It seems people have been sued for this by enosys · · Score: 5, Informative
      The time domain reflectometer (TDR) injects a signal into a wire and then gives you some info about reflections that happen. It essentially measures impedance along the line and so it will show anything inductive, resistive or capacitive on it.

      I'm sure a lot of people here have heard about TDRs being used to troubleshoot network cables.

      As for electric companies being called hydro, I'm in Canada (A former British colony and in the Commonwealth) and it's the same here. It really doesn't make that much sense anymore because most power comes from other sources.

    3. Re:It seems people have been sued for this by Ambient+Sheep · · Score: 3, Informative

      > Why are British power companies referred to as 'hydro?'

      Um, they aren't. Or if they are, I've never noticed in all my years of existence in the U.K. We also tend to have "secondary schools" not "high schools", so I'm pretty sure the grandparent poster wasn't British.

      Hydro isn't the main method of production over here in the U.K. The figures for England and Wales are:
      35% - Gas
      34% - Coal
      15% - Nuclear
      7% - Pumped Storage & Renewables
      5% - Interconnectors
      4% - Oil
      (Source: http://www.electricity.org.uk/media/documents/pdf/ Intro_UK_Elec_Ind.pdf
      There's more hydroelectric stuff in Scotland, which those figures don't cover though.

      While I'm here, the power-line in question is a major National Grid line (Melksham - Seabank / Imperial Park) carrying 400kV, with a peak power-flow of 161MW along one circuit and 481MW along the other, according to the National Grid website. Even before I saw the directions I knew where it was as it's very distinctive - most pylons in the U.K. don't look like that, they have the three phases stacked one above the other on each side of the tower. The cable configuration in the photo is usually only used for brief hops over sudden hills, as it is in this case. I wonder if the fact that it has four sets of conductors nearest the ground rather than just two was a factor in him choosing that site? (Yes, it's quite near Bristol, however there are other lines, indeed stretches of that line, that are much nearer.)

  21. Other things that fit this definition of "theft" by benjamindees · · Score: 4, Funny

    Breathing: you're taking oxygen that clearly was produced on a farm somewhere or maybe in the Amazon.

    Tinfoil hats: these devices intercept electromagnetic waves and cause transmission losses.

    Heat pumps: you didn't really think you could take all that "free" heat out of the air, did you?

    --
    "I assumed blithely that there were no elves out there in the darkness"
  22. Re:Electricity fun by RaymondRuptime · · Score: 3, Funny

    It'll be okay. Just reach around behind your ear and hit the degauss button.

  23. [Now OT] Re:Edible Electromagnetic Emission Art by ahoehn · · Score: 4, Funny

    I was grading papers for a college writing class the other day when I came across a paper that a student had written about measuring the speed of light using the microwaving chacolate method. At first I thought he was just making shit up, but then I looked it up on the interweb, and lo and behold, he hadn't made it up.

    Granted, he had copied his paper almost word for word from the interweb and I failed him for that, which just goes to show that it's dangerous to write papers that interest the graders.

    --
    Mod my comments down. It'll be fun.
  24. Re:free power - DMCA violation by NotQuiteReal · · Score: 4, Funny
    The power company ought to claim that the power is encrypted, and that, by not using the authorized wired delivery system, the artist is stealing.

    I am not allowed to use all the electromagnetic waves that pass thru my property.

    --
    This issue is a bit more complicated than you think.
  25. Re:electromagnetic waves kill also brain cells by glesga_kiss · · Score: 3, Informative
    Neither does ecstacy to be honest. The only study that "proved" permament damage was recently dubunked as they had done the experiment with amphetamines and not E!. Of course, the original study is still cited as proof about the "dangers" of the drug despite this (and many other papers by the same research scientist) being completely thrown out by the scientific community. FACT: Going fishing carries about the same risk of death as going out clubbing on E. Horse riding is many times more dangerous! And with all three, if you understand the risks and take precautions, you can reduce the risk of death to practically zero.

    But the parent post did mention beer. That does kill brain cells. You do it every time you get drunk. That's what drunk is; the poisioning of your brain by alcohol. And death on alcohol? Go and ask an ER doctor. Lots, never published in the news.

    Of course, when the majority of anti-drug messages are funded by the booze industry you have to laugh. I quite like the one on DrugFreeAmerica.org, telling how Ecstacy almost killed a girl, until you actually read the article and find that it was GHB. Actually, all the articles on that site are just as bad, and they seem to have been written by the same person, very similar style etc. ALL LIES I TELL YOU!! ;-)

  26. Interesting EHT effects at a power station by Tandoori+Haggis · · Score: 3, Interesting

    During a visit to a power station, we were shown the
    12 Mega Watt output cables. Asides from the crackling noise due to a light drizzle falling on the cables, there were other effects too.

    Having stood under the cables for a couple of minutes, I felt no adverse effect... until I started to walk away. That's when I started to get a headache...

    --
    My hyperlinks aren't worth the paper they're printed on.
  27. Re:electromagnetic waves kill also brain cells by afidel · · Score: 3, Informative

    Since high power lines are set back from the road at least 30m in most of the US and EM falls off at the cube of the distance I think there is a BIG difference between being right under them and driving past them.

    --
    There are 4 boxes to use in the defense of liberty: soap, ballot, jury, ammo. Use in that order. Starting now.