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DesMarie123
DesMarie123 asks:
Q:

Why do objects glow under a blacklight? What makes them glow and why?

In Topics: Science fair
> 60 days ago

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Expert

greenprof2
Jan 26, 2012
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What the Expert Says:

Many materials that fluoresce, or glow, when placed under a black light. A black light emits energetic ultraviolet light. You can't see this part of the spectrum, which is how 'black lights' got their name. Fluorescent substances absorb the high-energy ultraviolet light and then re-emit it at a visible, longer wave-length and causes the material to appear to 'glow'.

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