"Ahhh! My hand!"
Earlier today (well, yesterday, now), the eldest kid and I made a nerd road trip up to the new digital-tv transmitter shack up in the hills.
All afternoon, I had been brooding about standing at the foot of the broadcast tower while it was radiating a few megawatts of radio energy into space.
So, come sunset, I went down to the basement and dug out a couple of 48" fluorescent bulbs, and threw them and the family into the car. We drove over to the nearest high-voltage power line, and we watched the fireflies while we waited for full dark, and then we played light sabers in the gloaming.
ADDENDUM: Here's a guy who did an artistic installation of hundreds of fluorescent tubes under his local power line:
http://www.boxyit.com/r/index.htm
Better pictures here:
http://stopgeek.com/richard-boxs-light-field.html
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Labels: cheap entertainment, experiments, Geekery, parenting, Science
3 Comments:
Is this really true? Can you actually do this? Sounds like a good way to entertain the kids, and maybe demonstrate some principle (that is not widely known to the general public) . . . .
Oh yes: it really works.
The trick is, you need a HIGH-voltage power line: the big, tall, inter-urban towers. The electric field under it is energetic enough to make the phospors glow.
My local line runs from Niagara Falls to New York City - it's either 230,000 or 345,000 volts.
(The exact information has gotten hard to find in the post-9/11 world.)
Hey! I'm famous!
Brad DeLong picked up this post.
http://delong.typepad.com/sdj/2007/06/possibilities-f.html
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