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Richard Walker

Fluorescent Tonic

Visible to anyone in the world

It's little surprise that day-glo items like highlighter pens fluoresce under Ultraviolet but who would have guessed that Indian Tonic Water is also fluorescent? It's the quinine in it that causes the fluoresence.

Permalink 2 comments (latest comment by Richard Walker, Saturday, 1 Jan 2022, 01:19)
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