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| Description: Engelmann directed light through a prism so that bands of colors crossed a water droplet on a microscope slide. The water held a strand of Chladophora and oxygen-requiring bacteria. The bacteria clustered around the algal cells that were releasing the most oxygen—the ones that were most actively engaged in photosynthesis. Those cells were under red and violet light. These results constituted one of the first absorption spectra. Picture Stats: Views: 51 Filesize: 387.58kB Height: 1009 Width: 1328 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=49472 |