Negative pressure is a rare and challenging-to-detect phenomenon in physics. Using liquid-filled optical fibers and sound waves, researchers at the Max Planck Institute for the Science of Light (MPL) in Erlangen have now discovered a new method to measure it. In collaboration with the Leibniz Institute of Photonic Technologies in Jena (IPHT), the scientists in the Quantum Optoacoustics research group, led by Birgit Stiller, can gain important insights into thermodynamic states.
Calculations provide insight into why sound waves carry 'negative mass' – Physics World
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Light and sound waves reveal negative pressure - Innovations Report
Light and sound waves reveal negative pressure - Innovations Report
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Light and sound waves reveal negative pressure