Fluorescence and phosphorescence are both examples of photoluminescence. In both cases, light is absorbed and then re-emitted at a less-energetic wavelength. Fluorescent and phosphorescent objects usually glow under exposure to ultraviolet light (though this is not a requirement). Fluorescence involves absorbing and releasing lower energy light almost immediately, while the light release of phosphorescence is delayed, so these materials appear to glow in the dark.
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- Black LightUltraviolet light is invisible, but black lights or UV-lamps also emit some visible violet light.
- Phosphorescence ExampleExample of phosphorescence.
- Tonic Water FluorescenceTonic water is a carbonated soft drink that is flavored with quinine. The quinine is fluorescent.
- Glowing Fluorescent DyeGlowing Fluorescent Dye
- Fluorescent MineralsThis is a collection of fluorescent minerals, shown under ultraviolet light.
- Fluorescent Minerals KeyThis key identifies the fluorescent minerals.
- Glowing Magic PowerballsShining a black light on magic powerballs makes them glow brightly in vivid neon colors.
- Artificial Neon SignYou can make a glowing fake neon sign using plastic tubing and a black light.
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