Dual slit experiment: closing/opening a slit after the particle passes it . . .

Hello everyone,

I recall reading some time ago about an extension to the dual-slit experiment, where researchers either closed or opened a 2nd slit after the particle passed the slit but before it hit the detector.

Does anyone know about this research, like the results, and who performed it?



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If you open/close the slit after the particle passes, everything will be the same as if you have not did it.

Perhaps you were actually reading about delayed choice experiments, but that's something different.

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