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February 19, 2018

From groundwater flow to groundwater glow: why does groundwater fluoresce in ultraviolet light?

…if we shine ultraviolet light at groundwater samples, then they fluoresce due to the presence of organic molecules that are often present. Unfortunately, we can’t see any of this fluorescence with our eyes, as it is emitted in the middle- and long-range ultraviolet, so we must use detectors that can ‘see’ at these wavelengths.