I would like to know the results of a few scenarios with a beam splitter. (1) You send a single photon through a half silvered mirror with a reflector at either side, as above, but instead of having two detectors, and a 50% chance of either going off, you just have one detector, and where the other detector should be, there is just empty space for a long distance. What is the chance of the one detector going off? 100%? 50%? (2) Same as before, but with a laser beam, not just one photon at a time, any difference? (3) Two detectors, one photon at a time, but detectors are not equidistant, one further than the other. Thanks, I am curious as to the results of this, but can't find an easy source.