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这张不可思议的高速子弹照片揭示了一颗子弹离开枪管时空气中所发生的情况。以超音速(比声音更快)运动的子弹留下了一个“V”形的踪迹和一个球形的声波冲击波——砰的一声——充满了火药爆炸的烟雾。
This incredible high-speed bullet photo reveals what happens in the air when a bullet leaves the barrel. The bullet moving in supersonic (faster sound) leaves a “V” shaped trail and a spherical sound wave - a bang - filled with explosives of gunpowder smoke.