先前基于宏观电磁波(包含大量光子)的实验已经证明，光前驱是光脉冲在传播过程中最快的部分。
Previous experiments based on macroscopic electromagnetic wave propagation (involving lots of photons) have shown that the optical precursor is the fastest part in the propagation of an optical pulse.
本文报导了用动态光弹法记录的沿两种玻璃形成的界面上超声脉冲的传播过程。
The propagation process of ultrasonic pulse along solid-solid interface is recorded by the dynamic photo-elastic method in this paper.
导出了相应的“面积定理”，是将只关系到光脉冲在二能级系统中传播的面积定理的一种推广。
The corresponding area theorem is derived, which is a generalization of the area theorem related initially to the light pulse propagation through the two-level system.
导出了相应的“面积定理”，是将只关系到光脉冲在二能级系统中传播的面积定理的一种推广。
The corresponding area theorem is derived, which is a generalization of the area theorem related initially to the light pulse propagation through the two-level system.
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