XPost: sci.physics   
   From: jl@glen--canyon.com   
      
   On Fri, 13 Feb 2026 21:50:01 +0100, Jeroen Belleman   
    wrote:   
      
   >On 2/13/26 17:20, Stefan Ram wrote:   
   >> Bill Sloman  wrote or quoted:   
   >>>                        Energy has mass   
   >>   
   >>    Counterexample: The photon. It has energy, but no mass.   
   >>   
   >>   
   >   
   >The photon is an interaction, not a particle. Thinking of   
   >photons as discrete particles leads to madness.   
   >   
   >Jeroen Belleman   
      
   Wave-particle duality is madness.   
      
   Single photons sure behave like particles, especially the energetic   
   ones.   
      
   A gamma sure acts like a particle. It's harder to think about a 1 MHz   
   radio wave as a photon, since we are a lot smaller.   
      
   At optical wavelengths, the current from a good photodetector has   
   measurable shot noise from the photons. I wonder if there is some   
   microwave frequency where the electrical signal would have equivalent   
   photon shot noise, or whether thermal and Johnson noises bury the   
   effect.   
      
   Physics is fun, if you don't have to do it for a living.   
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)