When the plane wave returns and crosses the molecule, it produces an interference pattern with the stationary part of the electron wave function, like two trains of water waves crossing and forming a checkerboard disturbance.

• 一旦平面波折返并横越过分子，它便会与待在轨道上的电子波产生干涉图样，就像是两道水波相遇所形成的西洋棋盘般明暗交错的扰动。