How do glow in the dark toys work?

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Craig Milne

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How do glow in the dark toys work?
« on: 13/12/2008 19:33:11 »
Craig Milne asked the Naked Scientists:

How do some things such as toys glow in the dark?

What do you think?

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Offline chris

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How do glow in the dark toys work?
« Reply #1 on: 19/12/2008 08:55:05 »
This luminescent effect is achieved with chemicals that can soak up energy, rather like a sponge soaks up water, and then release the energy slowly in the form of visible light. The first example of this was copper-doped zinc sulphide, discovered about 100 years ago. This absorbs energy of various sorts and then allows it to trickle out as visible (green) wavelengths.

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