XPost: sci.electronics.design   
   From: jeroen@nospam.please   
      
   On 2/19/26 20:27, john larkin wrote:   
   > On Thu, 19 Feb 2026 20:52:48 +1100, Bill Sloman    
   > wrote:   
   >   
   >> On 19/02/2026 7:49 am, Ross Finlayson wrote:   
   >>> On 02/18/2026 12:43 PM, Python wrote:   
   >>>> Le 18/02/2026 à 20:13, Ross Finlayson a écrit :   
   >>>> ..   
   >>>>> and, you know, magnetic monopoles, is widely employed   
   >>>>> in medical imaging and the like.   
   >>>>   
   >>>> No.   
   >>>   
   >>> Resonance imaging (NMR) is a thoroughly different mechanism   
   >>> than Roentgen rays.   
   >>   
   >> But as the name implies, it's nuclei of the atoms involved that exhibit   
   >> the resonance. It's a remarkably low energy effect, and you need   
   >> remarkably high magnetic fields to get it to give you a detectable signal.   
   >   
   > The earth's field is enough. The hydrogen resonance is about 4   
   > KHz/gauss.   
   >   
   >   
   > John Larkin   
   > Highland Tech Glen Canyon Design Center   
   > Lunatic Fringe Electronics   
      
   I believe that, due to magnetic field perturbations in urban   
   areas, the resonance gets scrambled too quickly to be easily   
   detectable. In rural areas it should be easier.   
      
   Jeroen Belleman   
      
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