Talk:Absorption band

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	Absorption band is part of WikiProject Spectroscopy, an attempt to better organize information in articles related to spectroscopy. If you would like to participate, you can edit the article attached to this page, or visit the project page, where you can join the project and/or contribute to the discussion.
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[edit] Category

http://en.wikipedia.org/wiki/Wikipedia:Categorization says "An article should not be in both a category and its subcategory, e.g. Microsoft Office is in Category:Microsoft software, so should not also be in Category:Software. ". Absorption band is assigned both Electromagnetism and Physics, I feel its redundant. Electromagnetism, Spectroscopy would be more appropriate.