SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Quartz crystal oscillator from a watch. This tuning fork-shaped crystal vibrates at a specific frequency when exposed to an alternating electric current. Such crystals are used as timers in quartz watches. The interaction of the electrical and mechanical properties of a material is known as the piezoelectric effect.
Model release not required. Property release not required.