- #1
Charles123
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An infrared gas analyzer gives you the concentration of a given molecule that absorbs radiation in a specific infrared band, in a gas, by determining the attenuation of radiation of the frequency in case, when in a path between emitter and receiver is a sample of the gas in analysis. My question is, since the molecule will re-emit the radiation, and it can do this in any direction, some of it can reach the receiver. Therefore, in order to not account for this radiation, that would otherwise indicate a minor concentration of the molecule, what is done? Is it just a question of time lag of the re-emitted radiation in comparison to the radiation that reaches the receiver directly?
Thank you
Regards
Thank you
Regards