Talk:Absorption band

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Physics Start‑class High‑importance

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Chemistry Start‑class Mid‑importance

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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.