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Highlighter pens, fluorescent bulbs and road signs are just a few examples of a scientific phenomenon that makes colours appear brighter than usual – what’s the science behind this?

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All that glows: what makes highlighter ink so bright and what else

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All that glows: what makes highlighter ink so bright and what else

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All that glows: what makes highlighter ink so bright and what else

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4 Ways to Make a Glow in the Dark Fluid - wikiHow

How do Black Lights Work, Why do Highlighters Look So Bright, and

What colours glow in black light and why is it only some colours

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