Physics
Your gas lighter, your watch and a hospital ultrasound all run on one trick: a crystal that turns a squeeze into a voltage
17 Sept 2026 · 12 min read
Squeeze certain crystals and they generate a voltage. Apply a voltage and they change shape. The motion is almost absurdly small and the precision is almost absurdly good, which is why the same effect times your watch, images a foetus, prints a circuit and positions a microscope.
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