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Measuring light: the world’s most accurate ruler
![By looking at the colour of light in these crystals and the amount of gas absorption, researchers identify which and in what concentration gas molecules are present.](/ipas/sites/default/files/styles/ua_landscape/public/media/images/2024-02/1709077656255.jpeg?h=ddc58dd3&itok=kdmw-Hf-)
A portable laser device that tests your breath for signs of disease and organ failure is just the start of the University of Adelaide’s ambitions for laser technology.
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