stumped › Forums › Spectroscopy › Anomolous absorption line? › stumped 26 February 2021 at 11:05 pm #583897 Robin LeadbeaterParticipant Then I am stumped I am afraid. If it pops up again you could perhaps try moving the micrometer a touch to see if it moves with the spectrum and/or move the spectrum along the slit a bit to see if it is a localised defect Robin
