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It is called near-infrared spectroscopy ("NIRS") and you can read more about it here: https://en.wikipedia.org/wiki/Near-infrared_spectroscopy https://en.wikip
by _Microft 5y ago
It is called near-infrared spectroscopy ("NIRS") and you can read more about it here:
https://en.wikipedia.org/wiki/Near-infrared_spectroscopy https://en.wikipedia.org/wiki/Near-infrared_spectroscopy