2019 Volume 54 Issue 2 Pages 98-103
A novel double-slit experiment was performed using the state-of-the-art electron wave interference technology. Using an asymmetric double-slit, we conducted experiments called “which-way” experiments to determine which slit electrons passed through under the condition of a short propagation distance named as a pre-Fraunhofer condition. Individual electrons were categorized into three types; those that passed though only the left slit; those that passed though both slits simultaneously; and those that passed through only the right slit. The distribution of those electrons was explicitly shown in color-coded figure.