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When observing visible light through a prism or diffraction grating, how can you tell if a line spectrum is an emission spectrum or an absorption spectrum
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When observing visible light through a prism or diffraction grating, how can you tell if a line spectrum is an emission spectrum or an absorption spectrum

User Lukaszberwid
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The line of the prism will be blue. Blue is a know un true color
User IgorG
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