What is the cause of it ?" The vibration is caused by thc water falling on to the ground from the dam or into the lower water ; and it will, of course, affect all bodies in its neighborhood that ...

A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...

This series of time-lapse photos shows how the lens, made up of two droplets of water vibrating at a high speed, changes shape and, in turn, moves in and out of focus. The time between frames is ...