Remission (spectroscopy)
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Remission (lat. remittere), in spectroscopy, is the reflection or scatter of light by a material. Similar to the word "reemission", it is the light which is scattered backward from a material, as opposed to that which is "transmitted" though the material. The word "reemission" connotes no such directional character. Based on the origins of the words, "emit" means "to send out or away"; "reemit" means "to send out again"; "transmit" means "to send across or through"; and "remit" means "to send back".