Observation of Raman‐Shifted Fraunhofer Lines

ABSTRACT The Indian scientist Sir C.V. Raman, in 1928 has used sun light to perform an inelastic light scattering experiment, which later became known as the Raman effect. In preview of the centennial of the discovery of this effect in 2028, a similar experiment has been made, however, in an “inverted” arrangement, whereby wavelength sections of the sun light between a few Fraunhofer lines were used simultaneously for Raman excitation. A single, narrowband Raman line of high intensity had been employed for this purpose. The latter has been accomplished with the 1048 cm‐ 1 Raman transition of a barium nitrate (Ba[NO 3 ] 2 ) single crystal. As a consequence, the selected Fraunhofer lines appear in a spectral region shifted to longer wavelengths by 1048 cm‐ 1 .