XPost: sci.electronics.design   
   From: nospam@de-ster.demon.nl   
      
   wBill Sloman  wrote:   
      
   > On 20/02/2026 12:13 am, J. J. Lodder wrote:   
   > > Bill Sloman  wrote:   
   > >   
   > >> On 19/02/2026 9:56 pm, J. J. Lodder wrote:   
   > >>> 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.   
   > >>>   
   > >>> Nevertheless, it is easily demonstrated in the kitchen   
   > >>> with some simple electronics.   
   > >>   
   > >> Sort of.   
   > >>   
   > >> https://en.wikipedia.org/wiki/Nuclear_magnetic_resonance   
   > >>   
   > >> There are lots of different ways to exploit nuclear magnetic resonance.   
   > >> The earth's magnetic field is high enough to let you devise experiments   
   > >> that can demonstrate the effect on a kitchen table.   
   > >   
   > > Nothing 'sort of'.   
   > > You -can- easily demonstrate the effect on the kitchen table.   
   > > (at audio frequencies)  Wikipedia is right here.   
   >   
   > Yes, but we were talking about medical imaging, not nuclear magnetic   
   > resonance in general, and your assertion is the irrelevance here, as the   
   > text you snipped pointed out.   
      
   Which 'we' dear Bill?   
      
   I replied to your   
   ===   
   >>>> 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.   
   ===   
   which is just plain wrong.   
      
   As a matter of fact, zero to ultra-low frequency NMR   
   is a flourishing research field these days,   
      
   Jan   
      
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