Piezoelectricity - why hitting crystals makes electricity

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The Quartz Watch video is here: https://youtu.be/_2By2ane2I4

Certain crystals, like quartz will produce a voltage when hit. It's all to do with the arrangement of atoms and charge in the lattice. It's used in lots of things like piezo lighters, sensors, speakers and oscillators for timekeeping.

Animations by Dominic Burgess: https://www.youtube.com/channel/UCGI000V6ZIAQf97MNybAaLQ

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