From: pcdhSpamMeSenseless@electrooptical.net   
      
   On 07/24/2014 01:05 PM, ggherold@gmail.com wrote:   
   > On Wednesday, July 23, 2014 5:21:19 PM UTC-4, jeroen Belleman wrote:   
   >> On 23/07/14 21:36, ggherold@gmail.com wrote:   
   >>   
   >>> On Monday, July 21, 2014 5:55:26 PM UTC-4, RichD wrote:   
   >>   
   >>>> Let's say you radiate a pulse of energy from a dipole antenna at   
   >>   
   >>>> 100 MHz, equal to a single photon. Sort of tiny, but elctrical   
   >>   
   >>>> engineers are a clever lot, I'm sure they're up to it.   
   >>   
   >>>    
   >>   
   >>>>   
   >>   
   >>>> Rich   
   >>   
   >>>   
   >>   
   >>> Rich can I change your question to something that is kinda doable?   
   >>   
   >>>   
   >>   
   >>> So say a set up a light source on earth. Maybe it's monochromatic,   
   >>> but that shouldn't really matter.  And I can put attenuators in the   
   >>> beam such that I can reduce the intensity to ~1 photon/ second*.  Now   
   >>> on the moon I set up a big array of PMT's.  (and I also shut off the   
   >>> sun and all other light sources :^) We'll imagine the array covers   
   >>> the beam spread.  And now I monitor the PMT's.  What do I see?   
   >>> (Except for dark counts and stray light and all that.) I see a   
   >>> detection in one PMT and then a different one.. etc, the beam is   
   >>> spread out over many miles or whatever.  But I still get one count at   
   >>> a time.   
   >>   
   >>>   
   >>   
   >>> George H.   
   >>   
   >>   
   >>   
   >> What you'll see is that the detectors trigger randomly and   
   >> independently. No correlation. The trigger rate will obey Poisson   
   >> statistics. That's no proof that light is quantized! Only that the   
   >> light *detectors* are!   
   >   
   > That's OK, I was just trying to help out Rich with something more doable.   
   > At high intensity you see the light is spread out of some large area, but   
   only give ticks one detector at a time.   
      
   In a vacuum, light obeys Maxwell's equations to absurdly high accuracy   
   at any vaguely ordinary wavelengths and intensities.  So there's no   
   quantum behaviour to look at there.  (Yes, there are quantum   
   nondemolition and entangled state measurements, but they're not the   
   fundamental issue.)   
      
   It's the interaction with matter where the quantization shows up.   
      
   Cheers   
      
   Phil Hobbs   
      
   --   
   Dr Philip C D Hobbs   
   Principal Consultant   
   ElectroOptical Innovations LLC   
   Optics, Electro-optics, Photonics, Analog Electronics   
      
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