The infrared spectra for propanol, butanone, and butanoic acid are shown below. Which spectrum belongs to which molecule? 1 0.8 0.6 A 0.4 В 0.2 C 4000 3500 3000 2500 2000 1500 1000 500 wavenumber / cm1 Transmittance

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UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.