411 REFERENCE · Wiktionary
Frauenhofer's line
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
en Fraunhofer line.
7 I have read with amusement, not wholly unmixed with some less complimentary emotion, the complacent and wholly fatuous letter of James Wilson MacPhail which has lately appeared in your columns upon the subject of the blurring of Frauenhofer's lines in the spectra both of the planets and of the fixed stars.