(Thus formula (4) can be simplified, but I have expressed it as above to make clear the physical basis.) The counting of the bins must begin at bin most distance from the ≈ 0.40973 is the known lower bound , but the actual constant may be larger, up to 0.5606, 37% larger (it is conjectured that the constant is as given in ( ), but this has not been proven to date). Based on the double slit analysis , I do not expect this uncertainty to matter. Note that the uncertainty is less in the one-dimensional case.