As was reported by us in a recent note>1>, the monochromatic radiations of the zinc arc, namely, 4680, 4722, 4810 A., diffused longitudinally by liquid glycerine at 26° C., revealed, on either side of the primary lines, the presence of sharply defined displaced components in the spectrum of the scattered light. The spectral shifts of these components is 0.52 cm.>–1>, corresponding to a modulation frequency of 1.53 × 10>10> sec.>–1>.
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Raman, C. V., and Venkateswaran, C. S., NATURE, 142, 791 (1938).
Clerk Maxwell, "Scientific Papers", Vol. 2, "Dynamical Theory of Gases", 31.
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RAMAN, C., VENKATESWARAN, C. Rigidity of Liquids. Nature 143, 798–799 (1939). https://doi.org/10.1038/143798a0
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Proceedings of the Indian Academy of Sciences - Section A (1939)