On the Relative Intensities of Stokes and Anti-Stokes Lines in h e Raman Specttum,

(Receiued for pu blico tion, 14th July, 1931.)

ratio of tbe intensities of the Raman Iines of f reqowek (Y+v),, and (v-v,,) has h e n determined by the method a£ diaplacament of blackening-log intensity annee in tbe m~ of two linm due to carbon tatrachlorida b e i n g v,, equal to 1363 x 10'0 d 945x10'0 reepectively. It baa been found thrt themid ratio re ob- erperirneatally, ia representea more wnlately by the qrmsioa

. e KT ae given by P h e k ' e theory, thrn bf tba

maun faotor alone.

Raman and Krishnanl showed that the relatire intend- ties of the lines of freqnanries v+ V, and P-F, o h m ed in the scattered light with tbe incident freqnenq P, are

h.., at least approximately given by the ratio h 'F where h, k and T are the Planok'a constant, Bolhmrurn mostant per molecule and the absolute temperature respeativelg . Omtein

- . J,.,.

and Rekveld suggested a modified formula t+> rn c-,.