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hokhani
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What are the axes(horizontal & vertical axes) in a Raman spectrum?
The axes in Raman spectroscopy refer to the two axes on a graph used to plot the Raman spectrum. The x-axis represents the Raman shift, which is the difference in energy between the incident and scattered light. The y-axis represents the intensity of the scattered light.
The Raman shift on the x-axis corresponds to the vibrational modes of the molecules being analyzed. The peaks on the spectrum represent the different vibrational modes and the intensity of the peaks is related to the strength of the vibrational modes.
The Raman shift axis is typically expressed in units of wavenumbers, which represent the inverse of the wavelength of the light used for the analysis. This unit is commonly denoted as cm-1.
The intensity of the peaks on a Raman spectrum is directly proportional to the concentration of the sample being analyzed. This is because the intensity is affected by the number of molecules present in the sample, which is directly related to its concentration.
The axes in Raman spectroscopy provide valuable information about the molecular structure and composition of a sample. The Raman shift axis reveals the vibrational modes of the molecules, while the intensity axis can provide information about the concentration and chemical bonds present in the sample.