Points from Foregoing Letters


    PHOTOGRAPHS showing the interference pattern of light scattered by thermal agitation (elastic weights) in a clear crystal of gypsum are submitted by Sir C. V. Raman and C. S. Venkateswaran. The displacement of the three components into which the incidental radiation is split indicates, according to Brillouin's formula, acoustic Wave velocities of 3,350, 2,050 and 1,100 m. per sec.

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    Points from Foregoing Letters. Nature 142, 258 (1938). https://doi.org/10.1038/142258a0

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