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| Description: (a) When a CCD is placed at the focus of a spectrograph, the spectrum is recorded. In this case, it is from a hot object whose light shines through hydrogen gas. (b) This spectrum is converted by computer into a graph of intensity versus wavelength. Note that the absorption lines appear as dips in the intensity-versus-wavelength curve. Picture Stats: Views: 642 Filesize: 54.63kB Height: 900 Width: 381 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=15927 |