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| Description: This schematic diagram summarizes how different types of spectra are produced. The prisms are added for conceptual clarity, but in real telescopes, diffraction gratings are used to separate the colors. A hot, glowing object emits a continuous spectrum. If this source of light is viewed through a cool gas, dark absorption lines appear in the resulting spectrum. When the same gas is viewed against a cold, dark background, its spectrum consists of just bright emission lines. Picture Stats: Views: 806 Filesize: 192.47kB Height: 900 Width: 1249 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=15928 |