XPost: sci.physics.relativity   
   From: jl@glen--canyon.com   
      
   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   
      
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