Three examples of PAH ultraviolet fluorescence with anthracene (blue), pyrene (blue-green) and pyrelene (yellow). From left to right, the fluorescence is apparent on glass slides, on PAH-doped peridotite granular targets on glass slides, and on a rock sample of peridotite. Image courtesy of M. Storrie-Lombardi.
Credit: Oregon State University, M. Storrie-Lombardi
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