The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio waves, microwaves, visible light, ...

In contrast, a small amount of light is scattered at different wavelengths depending on the chemical structure of the analyte (Raman scattering). A Raman spectrum is a vibrational spectrum, where each ...

and the absorbance or reflectance is recorded as a function of wavelength. The resulting spectrum can be analyzed to extract information about the sample's optical properties and electronic structure.