This was from Insight 2008.
All types of spectroscopy use a part of the electromagnetic spectrum. One spectroscopic technique is used in the analysis of sodium chloride in potato chips. This technique uses radiation from the visible part of the electromagnetic spectrum to give quantitative information.
i. Name the spectroscopic technique used in this analysis.
The answer is:
Atomic absorption spectroscopy
Because: Only atomic absorption spectroscopy can quantitatively analyse metal atoms present, such as when sodium chloride is sprayed into the flame and visible light of the correct wavelength passes through the excited sodium atoms. The other spectroscopic techniques (e.g. UV-visible, IR and NMR) use radiation in the part of the spectrum that is not visible.
I thought UV-Visible uses light in the visible spectrum?
Can anyone help me with this please?