Wave-length shifts in scattered light


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ABSTRACT (_By Cable, through Science Service, Washington, D.C._) PROF. RAMAN'S brilliant and surprising discovery that transparent substances illuminated by very intense monochromatic


light scatter radiations of modified wave-length, and that frequency difference between emitted radiation and one exciting medium is identical with frequency of infra-red absorption bands,


opens up wholly new field in study of molecular structure. I have verified his discovery in every particular, using improved apparatus which makes it possible to photograph strongest lines


in few minutes. Anti-Stokes' terms of intensity nearly equal that of lines of wave-length greater than exciting line obtained chloroform, carbon tetrachloride, latter giving triplet


each side 4046, 4358, 5461 lines mercury arc. Raman reported no trace modified lines excited latter line, but are strong with carbon tetrachloride. Triplets short wave-length sides exciting


lines appear mirror images those long wave-length side, considering exciting line mirror. Crystalline quartz gives strong line identified as 20μ absorption band, and fainter line very close


exciting line corresponds infra-red absorption about 75μ. Raman's discovery thus makes possible investigation remote infra-red regions hitherto little explored owing experimental


difficulties. As yet I have found no line corresponding more generally known band quartz (eight and half μ). This expected as small energy exchanges between impinging light quanta and


molecules more probable than large; these correspond absorption bands very long wave-length. SIMILAR CONTENT BEING VIEWED BY OTHERS ALL ELECTROMAGNETIC SCATTERING BODIES ARE MATRIX-VALUED


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AUTHORS AND AFFILIATIONS * Loomis Laboratory, Tuxedo, New York R. W. WOOD Authors * R. W. WOOD View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND


PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE WOOD, R. Wave-length Shifts in Scattered Light. _Nature_ 122, 349 (1928). https://doi.org/10.1038/122349d0 Download


citation * Issue Date: 08 September 1928 * DOI: https://doi.org/10.1038/122349d0 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable


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