In food science, data from points in this region are fed directly to partial least squares to quantitatively distinguish oils and other lipids. For 10 points each:
[10m] Name this analytical region dominated by low-energy peaks corresponding to complex skeletal motions.
ANSWER: fingerprint region [prompt on mid-infrared or mid-IR]
[10h] Peaks from this in-plane motion dominate the right side of the fingerprint region. A large number of methylene units can undergo this kind of vibration, producing the “long chain band” at 720 inverse centimeters.
ANSWER: rocking
[10e] Broadband IR sources remain popular in part due to the “terahertz gap,” which has made it difficult to obtain suitable examples of these devices with collated monochromatic output.
ANSWER: infrared lasers [or light amplification by stimulated emission of radiation]
<Chemistry>