Well, from what I have read, every time the two grates were in place, the helium atom passed through, on many paths in many forms, just like a wave. But whenever the second grate was not present, the atom invariably passed through the first grate like a particle. The thing that I am worried about is, the second grate’s very existence in the path was random. And what’s more, it hadn’t happened yet.
They allow the particle through the first grate before the randomly generated second gate it either there or not there, and it was as if the helium particle “knew” whether there would be a second…