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Initially I wanted to ask this exact question about color change due to "white" light source spectrum change, and the accepted answer satisfies me fully.

However the answer says that most of objects have "rarely a nice clean notch" in the reflectance spectrum. But I wonder where I can find a list of accessible materials, that could create such mind-boggling effect.

I want to make a scientific show for kids, and my goal is to explode their brains.

Qmechanic
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user46147
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  • You don't mean smth like a sheet of white paper, that looks different when illuminated differently (green when illuminated with green, red when with red, etc)? – John Jan 18 '23 at 05:47
  • A solution of holmium chloride changes color dramatically when switching between daylight and fluorescent lamp lighting. Look up holmium oxide in wikipedia to see the color change: https://en.wikipedia.org/wiki/Holmium%28III%29_oxide. – Ed V Jul 20 '23 at 22:02

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Here is how to do it.

There are certain semi-precious gemstones which, when illuminated with a certain color of incident light, appear a different color from the incident color- or from their color when illuminated with full-spectrum light. When I remember the name of the stone I will edit this response, but it IS mind-blowing! See https://www.google.com/search?rlz=1C1CHBF_enUS746US748&lei=5YXHY6XVIvza0PEPs-Ck0A0&q=list%20of%20color%20changing%20gemstones&ved=2ahUKEwjl2-jWs9D8AhV8LTQIHTMwCdoQsKwBKAF6BAh-EAI.

niels nielsen
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