In contrast to Crookes’ radiometer, which rotates due to electromagnetic radiation, the analogous acoustic radiometer demonstrates radiation pressure. The apparatus consists of two panes attached to opposite ends of a horizontal arm that is pivoted at its center. One side of either pane is acoustically reflective and the other absorptive. The apparatus rotates when placed in an enclosure of high-intensity acoustic noise. Experimental values of the terminal angular velocity are in reasonable agreement with approximate theoretical predictions based on radiation pressure.
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Denardo et al. (2004) studied this question.
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