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Old 10-10-2006, 09:15 AM
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0love0046 Why do Wint-O-Green candies spark in the dark?

Just a neat fact I read about:

Actually, all hard sugar-based candies emit some degree of light when you bite them, but most of the time, that light is very faint. This effect is called triboluminescence, which is similar to the electrical charge build-up that produces lightning, only much less grand. Triboluminescence is the emission of light resulting from something being smashed or torn. When you rip a piece of tape off the roll, it will produce a slight glow for the same reason.

Triboluminescence occurs when molecules, in this case crystalline sugars, are crushed, forcing some electrons out of their atomic fields. These free electrons bump into nitrogen molecules in the air. When they collide, the electrons impart energy to the nitrogen molecules, causing them to vibrate. In this excited state, and in order to get rid of the excess energy, these nitrogen molecules emit light -- mostly ultraviolet (nonvisible) light, but they do emit a small amount of visible light as well. This is why all hard, sugary candies will produce a faint glow when cracked.
But when you bite into a Wint-O-Green Life Saver, a much greater amount of visible light can be seen. This brighter light is produced by the wintergreen flavoring. Methyl salicylate, or oil of wintergreen, is fluorescent, meaning it absorbs light of a shorter wavelength and then emits it as light of a longer wavelength. Ultraviolet light has a shorter wavelength than visible light. So when a Wint-O-Green Life Saver is crushed between your teeth, the methyl salicylate molecules absorb the ultraviolet, shorter wavelength light produced by the excited nitrogen, and re-emit it as light of the visible spectrum, specifically as blue light -- thus the blue sparks that jump out of your mouth when you crunch on a Wint-O-Green Life Saver.
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Old 10-10-2006, 09:16 AM
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Sorry everytime I typed the word G-L-O-W the little flowers popped up
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Old 10-10-2006, 03:31 PM
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I'm going to buy some and shut the lights off to see if I get a spark.........what a great lesson in chemistry for my kids
thanks
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Old 10-10-2006, 04:13 PM
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i always wondered why they sparked. i can remember eating them when i was a kid just to see the spark. i would go into the bathroom with the lights out in front of the mirror and eat a whole pack...
the silliest things that amuse a child.
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Old 10-10-2006, 04:19 PM
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I love info like this!
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