scott wrote:
> I wonder how many photons typically exist? 

Mu.

That is the answer that unasks the question.

The question doesn't make sense to ask. If you didn't look at the photon, it 
might or might not have existed. Then there are virtual photons, which come 
and go, which by definition you cannot look at.

There's probably some statistical thing that'll tell you some expected 
numbers, but it's not really the same question.

-- 
   Darren New, San Diego CA, USA (PST)
   There's no CD like OCD, there's no CD I knoooow!

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