Laser interferometer research

Laser interferometer research

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Caption: Laser interferometer research. Physicist adjusting a laser interferometer, which is being used to analyse a material's piezoelectrical ability. Piezoelectric materials are able to generate an electric potential in response to mechanical stresses. Only particular materials are piezoelectrical, such as crystals like quartz or certain ceramics. Photographed at the National Physical Laboratory in Teddington, UK.

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