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Safety and Health Topics > Multimedia > Quartz Slide Presentation > How IR Works

How IR Works   35 of 72   Next   Back   Menu   Index   As shown, the molecule has a vibrational movement which allows for absorption of light energy. In theory, no two compounds have the same absorption spectrum. In practice, this is not the case; one of the weaknesses of infrared spectroscopy is the ability of other molecules of similar structure to also absorb light at similar wavelengths. Silicates with a similar tetrahedral structure can interfere with the determination of quartz.

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