In 1908, the American scientist Arthur Worthington made his “Study of the splashes”, which produced the first known photographs of the impacts of drops. Now researchers at the University of Cambridge have discovered that the sound produced when a drop of water hits a liquid surface is caused by the vibratory movements of a small bubble of air created in the impact and dragged on the surface. “Without the bubble, there is no noise”. In Spanish: bit.ly/2trlThd Video: bit.ly/2yBgnxJ

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