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Heterodyne spectroscopy at very low frequencies |
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| Authors: | Dominique LangevinJacques Meunier Marie-Anne Bouchiat |
| Affiliation: | Ecole Normale Supérieure, Paris 5, France |
| Abstract: | We have studied the spectrum of light scattered by capillary waves, thermally excited at the free surface of highly viscous liquids, by heterodyne spectroscopy techniques. We were able to measure spectral widths down to 0.2 Hz. |
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