What is the significance of using different excitation wavelengths in raman spectroscpoy? Does raman shift depend on the excitation wavelength?
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The frequency of the light is inversely proportional to the wavelength, and so all other things being equal, the shorter excitation wavelength will yield a stronger Raman signal. That is one of the reasons why, when given a choice, Raman spectroscopists prefer shorter excitation wavelengths
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