[ExI] CQT Researcher Uncovers Quantitative Link Between Quantum Non-Locality and Uncertainty.

[spike]

>... On Behalf Of Damien Broderick
...

>Can you bounce the light off a mirror, or send it through a lens, before
running it through the two slits, and still get fringes? 

Yes to both, although I haven't actually done those experiments, so I am
relying on my suspect understanding.  A laser beam doesn't know it has been
reflected off a mirror, as far as I can tell.  In every case where I have
used them, they behave the same coming off as they did coming into the
mirror.  Sending a light source thru a lens: the double slit result predates
lasers by a long ways.  I don't know how the beam was focused, but it stands
to reason they did it somehow.

> I would assume that you can't, because that *would* be a "measurement".
Damien Broderick

Excellent questions, but it isn't clear to me that sending photons at a
mirror or thru a lens constitutes a measurement.  I don't see how a mirror
or refractive element gains any information about a photon with which it
interacts.  But I am no expert on this.  Open to suggestion.

spike