Oscillating quartz crystal,photographed housed in its capsule packaging. Quartz crystals vibrate at a defined frequency when exposed to an applied alternating electric field. Such crystals are used as timers in quartz watches. The phenomenon of the interraction of electrical and mechanical variables in a medium is known as the piezoelectric effect. Conversely,the compression of a quartz crystal may generate an electrostatic voltage across the crystal. This principle has been applied in the ignition system for some cigarette lighters | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Michler, Astrid & Hans-Frieder |
Taille de l’image : | 3543 px × 2675 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |