Optical depth is measured in units of the mean free path. 光学路径以平均自由路径为单位进行量度。
Results show that the change of power affects ions'bombardment on the substrate, and that of pressure lead to the change of the mean free path of the molecular. 结果表明,射频功率的改变直接影响到离子对衬底的轰击效应,而反应气压的改变影响气体分子的平均自由程(MFP)。
On average, the photon will be scattered by the time it traverses a distance of just one mean free path. 平均而言,光子被散射的时间就是它恰好传播一个平均自由路径的时间。
Relation between temperature and mean free path in the Franck-Hertz experiment 弗兰克-赫兹实验中温度与电子平均自由程(MFP)的关系