牛顿引力是势函数
气压梯度本质上就是使空气由高压区向低压区流动的作用力
回答: 常称频率相同,振动方向几乎相同并在观察期间内两振动的位相差保持不变的两个振动是相干的.还要求两列波振幅相差不大,光程差不超过相干
由 marketreflections
于 2009-12-13 17:18:18
牛顿引力是势函数
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