Eugene Leitl wrote:
>
> John Clark writes:
>
> > But don't take my word for it, get yourself 2 LASERS and have the
> > beams intersect at a right angle and see if they effect each
> > other. They won't.
>
> You forgot to add "in vacuum". ;)
>
> In air, over a critical flux, they will. Even more so NLO-matter
> mediated.
>
> Also, I'm still unsure whether one can boost virtual
> particle-antiparticle pairs from Dirac's sea into real existance, if
> your shine is powerful enough. Vacuum, the NLO medium of the power
> user ;)
Now, space is not a true vacuum. Indeed over distance of dozens of light years,
there are likely as many hydrogen atoms diffusing a laser beam as air molecules
over the distance of a few feet, at least. In which case, there WILL be
interference over interstellar distances, as I said.
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