Half a croissant, on a plate, with a sign in front of it saying '50c'
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This would work fine, except in terms of success.

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On-Screen gauss meter

 Meter measures EMF using computer screen
  (+3)
(+3) 		  [vote for,
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Ok, so guass meters are like $100, right? Not this one; it has a program which reads which monitor driver you have, looks up a database online, and accordingly shows you a concentric grid on your screen, demarcated for gauss units. You then place the EMF source to be gauged against the glass of the monitor...how strong the field is, you will be able to see based on how far the discoloring effect spreads.
—saschathecat, Oct 11 2005

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       + Very clever, although probably not too effective with non-CRT based displays.
—bristolz, Oct 11 2005
   


 

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