On 27 February 2015 at 13:04, meekerdb <[email protected]> wrote: > On 2/26/2015 3:24 PM, LizR wrote: > >> Can you explain the problem a bit more for us dummies? ISTM - probably >> this just shows I don't understand the problem, but I may as well state my, >> ahem, position - that all measurements made using a physical apparatus are >> going to resolve into the position of something, e.g. the position of a >> pointer or pixels on a display. Is that anything to do with the "position >> basis" and if so why is that a problem? >> > > I don't think they always involve the position basis. But once we get the > measurement in whatever basis we can classical transfer it into a position > basis which is an easy way to share it. For example, we can 'see' the > momentum of photons provided they are in a certain range. But we use > instruments (e.g. grating) to spread them out so the momentum is measured > by the location of a spot on film instead of seeing the photon directly and > judging its color. > > OK, so maybe positioning things makes them easier to measure, I guess. But I don't see why this is a problem for interpretations of QM.
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