Dual Slit Experiment: Detecting Photons/Particles?

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SUMMARY

The discussion centers on the implications of placing a detector at the emitter in the Dual Slit Experiment, specifically regarding photon and particle behavior. Participants confirm that detecting which slit a photon or particle passes through eliminates the wave-like interference pattern. RandallB emphasizes that positioning a detector at the emitter effectively transforms it into the source, maintaining the same experimental outcomes. Moving the detector closer to one of the slits results in the loss of the interference pattern due to the lack of illumination at the other slit.

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jimcave
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hello - I wonder has anyone tried to place a detector for (photons/particles) just as they leave the emitter. If so does the wave like behaviour disappear?
 
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At the emitter or source does not make a diff.
But there are many ways to detect "which way" or which slit and all remove the wave like interferance. Do a search here on "double slit" or "Erasure".
 
Yes, RandallB is right, because a detector at the emitter really just turns that into the source. If you still have the same experiment with the source at that point, then you'll still get the same experimental result. If you move the detector closer to one of the slits, then you are in effect doing the experiment with the source at that point, and when you fail to illuminate the other slit with that source, then you will lose your interference pattern.
 

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