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- The spectrographs use a technique called OH-suppression to increase the sensitivity of the ob [[Category:Spectrographs]]2 KB (288 words) - 14:51, 10 December 2011
- With the development of [[photographic film]], the more accurate [[#Spectrographs|spectrograph]] was created. It was based on the same principle as the spect In modern spectrographs in the UV, visible, and near-IR spectral ranges, the spectrum is generally11 KB (1,486 words) - 14:51, 10 December 2011