Bell C E, Maccabee B S
Appl Opt. 1974 Mar 1;13(3):605-9. doi: 10.1364/AO.13.000605.
Shadowgraph techniques, using a Q-switched ruby laser as a light source, have been used to examine the shock waves produced in air and in water by focusing CO(2) TEA laser radiation at an air-water interface. It is found that the shock speed in water decays to the sound speed within 0.5 microsec, while the shock speed in air persists at values higher than the sound speed for times long compared to 0.5 microsec.
采用调Q红宝石激光器作为光源的阴影照相技术，已被用于研究通过将CO(2) TEA激光辐射聚焦在空气-水界面上而在空气和水中产生的冲击波。研究发现，水中的冲击波速度在0.5微秒内衰减至声速，而空气中的冲击波速度在比0.5微秒长得多的时间内持续保持高于声速的值。
