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How is it possible to use a spectrophotometer to measure a colorless compound?

April 26, 2017colorless compound measure optics physical Physics possible sciences spectrophotometer

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How is it possible to use a spectrophotometer to measure a colorless compound?

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1) “A UV-visible spectrophotometer measures absorbance or transmittance from the UV range to which the human eye is not sensitive to the visible wavelength range to which the human eye is sensitive. In the following experiment the spectra of two compounds, a colored one and a colorless one, are measured. The intention is to demonstrate that in many cases colorless compounds have a UV absorbance.” Source: http://fb05.fh-bonn-rhein-sieg.de/data/anna_/Lehrveranstaltungen/Instrumentelle%20Analytik/UV-Vis_prak.pdf 2) “The most common spectrophotometers are used in the UV and visible regions of the spectrum, and some of these instruments also operate into the near-infrared region as well. Spectrophotometers designed for the main infrared region are quite different because of the technical requirements of measurement in that region.