In visible light a spectrometer can separate white light and measure individual narrow bands of color, called a spectrum. The first spectrometers were used to split light into an array of separate. This is a measure of how finely a spectrometer can resolve spectra. It's often given as a single number – the “width” in nanometers of a very narrow spectral line measured with a specific spectrometer, grating and camera. Confusingly, “high” spectral resolution means a low number and very narrow. The basic premise of spectroscopy is that different materials emit and interact with different wavelengths (colors) of light in different ways, depending on properties like temperature and composition. This is acting as an anti-viral drug, and it showed the maximum absorption at 414 nm (visible range) by reacting with NaOH and 1,2-napthaquinone 4-sulphonate. The details are shown in the following (Figure 4).
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