[js1138]

Passing a stream of electrons through a pair of closely spaced slits and seeing an interference pattern similar to light would not be surprising as within that stream each electron would have some small effect on any other electrons near it, possibly pushing them to the side enough to go through the 2nd slit. All of this I have had to deal with in color CRT (picture tubes) construction.

But what if the interference pattern appears when you use one electron or photon at a time?

which is how the experiment is done.

[Wurlitzer]

"But what if the interference pattern appears when you use one electron or photon at a time? which is how the experiment is done. "

That would an atomic particle of a different color. I did not pick up that it was a single electron. Thanks for pointing that out.

I would still need to know how many electrons were measured at the target site. If a single electron is always received yet an interference pattern exists then it is out of my league. However, two or more electrons hitting the target when only one was sent can be explained depending upon the voltage potentials at the emitter, mask with the slit and the target.