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- From: silverstein@vxdesy.desy.de
- Subject: Jacob's Ladder (WAS Re: What are those things called...)
- Message-ID: <1992Jul26.215532.1@vxdesy.desy.de>
- Lines: 25
- Sender: news@dscomsf.desy.de (USENET News System)
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- Organization: (DESY, Hamburg, Germany)
- References: <1992Jul23.214214.8574@microplex.com> <Bs0D4v.466@helios.physics.utoronto.ca>
- Date: Sun, 26 Jul 1992 21:55:32 GMT
-
- In article <Bs0D4v.466@helios.physics.utoronto.ca>, jamesm@helios.physics.utoronto.ca (James Mihaychuk) writes:
- > In article <1992Jul23.214214.8574@microplex.com> hsk@microplex.com (Harjeet Kalsi) writes:
- >>I know I've seen them in physics labs (including mine when I was in school)
- >>but forgotten what this "box" with two antennas, that has a high
- >>voltage spark travelling between the antennas from bottom to top,
- >>is called.
- >>
- >>hsk@microplex.com
- >
- > My high school physics teacher told me it was called a Jacob's Ladder, although
- > there might be other names.
- > ---
- > James Mihaychuk, indentured servant You say your moon's in the seventh house,
- > (lowly physics grad student) But your butt spent three days on my couch
- > jamesm@helios.physics.utoronto.ca "Eternal Fatalist," the Lowest of the Low
-
- Yeah, that's what I've always heard it called. Now, here's a puzzler for
- you. The two "antennae" are closer together at the bottom than at the top,
- and the spark starts at the bottom and travels upwards. Now, a spark prefers to
- "jump" the shortest gap between two conductors. So why does the spark move up?
- (Let's see how many people REALLY listened to their high school instructor :-)
-
- Sam Silverstein
- UW-Madison Department of Physics
-
-