When the frequency of laser standing wave is higher than the resonant frequency of atoms, the atoms will be focused on the wave node of the standing wave.
当激光驻波场的频率大于原子的共振频率时，原子由于受到偶极力的作用将被会聚到驻波的波节处。
Under the frequency of resonance, small particles which are in the bottom of an upright standing wave tube will rise and move to the node, or loop planes, and keep suspending there.
竖直放置的驻波管在共振频率下，位于其管底的微小颗粒群会在一定声压级下产生悬浮现象，即腾空而起，悬浮在波幅波节平面。
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