XPost: sci.physics.relativity   
   From: bill.sloman@ieee.org   
      
   On 20/02/2026 2:46 am, Ross Finlayson wrote:   
   > On 02/19/2026 02:56 AM, 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, [1]   
   >   
   > The usual idea of cavity resonators is common to microwaves and lasers.   
      
   The dimensions of the resonant cavity are a bit shorter in lasers.   
   The cavity magnetron hasn't got a lot on in common with a gas laser.   
      
   The dimensions of the cavity in a cavity magnetron are lot closer to the   
   wavelenght of the radiation being generation than space between the   
   mirrors in a gas laser or the cavity defining interfaces in a a diode laser.   
      
   --   
   Bill Sloman, Sydney   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)