A Raman spectrograph

Abstract

In 1928 Sir C.V. Raman and K.S. Krishnan. Nature 121:501 (1928) C.V.Raman. Indian J Phys 2:387 (1928). C.V. Raman and K.S. Krishnan. Ibid. p399 discovered the phenomenon named after him. His first successful experiment was very crude. Sunlight was the source and his eyes were the detector. Two filters were used which together could extinguish sunlight. An intervening sample caused scattering of the light and some of the scattered light passed through the second filter. To do this some of the scattered light must have changed frequency in the solution. Landsberg and Mandelstam S. Landsberg and L. Mandelstam. Naturewissenschaften 16:551 and 722 (1928) observed the same effect in quartz but Raman's thorough study gave him the Nobel prize in 1930.