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4

The photons are not detected at the slits. They are detected at the screen. This has been done with single photons, as seen in this video. Generally if a detector is put in one slit, the interference disappears. Here is the build up of single electron interference Successively longer integration times as electron arrivals (white dots) are ...

2

"The difference between theory and practice is that, in theory, there's no difference, but in practice, there is." At Colorado State University over the past several years, students using the Teachspin muon lifetime apparatus have been consistently getting muon lifetimes that are slightly but significantly too short. In late 2012 I spent several months ...

15

Your worry is not necessary. In the usual experiment the detector measures the distribution of the time between the muon stopping in the detector and the time of it's decay. Then an exponential curve is fit to the data and the lifetime taken from the fit parameters Muon decay is a processes analogous to radioactive decay, and (like all exponential ...

4

I just realized what the problem is. It actually doesn't have anything to do with the detector. When working in vacuum systems you have to worry about the dielectric breakdown of the air as the pressure is reduced. It turns out that the breakdown voltage hits a minimum around $\sim 1$ Torr depending on the species of the gas (see the curves below). This ...

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