Complementarity in the double-slit experiment: On simple realizable systems for observing intermediate particle-wave behavior

In the course of a detailed analysis of observable intermediate particle-wave aspects of light, Wootters and Zurek invented an ingenious but technically difficult practical apparatus for performing Einstein's version of the double-slit experiment. The present note discusses two very simple alternative systems for displaying the Bohr-Einstein particle-wave extremes or, if desired, any intermediate trajectory-interference manifestation associated with the double-slit experiment.