On 11/30/2012 10:44 AM, John Clark wrote:
Now let's do the more usual two-split experiment and put the film back in. The universe
splits just as it did before when it passed the two slits, but when the photon hits the
film and it no longer exists in either universe then the 2 are identical and the
universes fuse back together again. Looking back we find evidence that the photon (or
electron) went through slit X only and evidence it went through slit Y only and this
causes an interference pattern. Again there is nothing special about an observer in
this, the same thing would happen if nobody looked at the film, or even if you used a
brick wall instead of film, because the important thing is not that the photon makes a
record (whatever that is) but simply that it is destroyed.
But you can do the experiment with electrons too, and the electrons are not
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