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>>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
>But can it really be said to have been destroyed? Doesn't the photon add its
>energy to a particle "here" rather than "there," which may (in fact, must) have
>ramifications later and therefore imply, observer or not, that the two universes
Heisenberg tells us that there is a point where the change to a physical system is so small that there is no change at all.
>Or is it that both states exist in the same universe until a definitive
>measurement traces it back to the original root cause, and thus
>fragments the potential states and renders one nonexistent retroactively?
I hope not because then many worlds would louse its only advantage and have to explain exactly what a measurement is and get into that endless quagmire; we'd be back to where we started.
John K Clark firstname.lastname@example.org
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