[rescue] Oh no! This poor Origin server.....
alaric at caerllewys.net
Thu Apr 1 22:16:39 CST 2004
On Thu, Apr 01, 2004 at 10:53:44PM -0500, Dave McGuire wrote:
> Well...think of it in the context of the geomagnetic field. Any
> ferrous metals within a magnetic field will distort that field...which,
> when viewed from the perspective of a single point in space, will be
> apparent as variations in the intensity of the field.
Yup, with you that far.
> So...use it as a hypersensitive metal detector. Not to find watches
> on the beach, but to find coins under a thousand feet of water.
Wow. That sensitive? How do you turn the output signal into location
information? (Or is this left as an exercise for the student?)
> Or use it to detect cars & trucks driving by, just for shits &
Unfortunately, I'd probably create a bigger signal just walking around
the room, with all the metal in my leg.
Then again, it *is* stainless steel, which is diamagnetic ....
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