Sugar Emit Green Light In The Dark

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A nice physics experiment to see! The compression on the sugar crystal, creates a charge separation inside ...
A nice physics experiment to see! The compression on the sugar crystal, creates a charge separation inside it (a phenomenon called piezoelectricity). This charge separation creates enough current to excite nitrogen in the air. The nitrogen emits light. Wintergreen candies (if you can find them in your country) will make a stronger light. Quartz crystal will do the same and it can even light a LED if connected with. You can also crush the crystal with a pair of pliers. Have you ever tried to smash small sugar cubes in total darkness with a hammer ? It's hard :)
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