Why do Certs spark when you bite them in the dark? Is this electricity?
What you see when you bite into a Cert in the dark is a manifestation of what is called "triboluminescence"-- the mechanical generation of light. That is to say, some substances become luminous when scratched, crushed, or rubbed. Several minerals exhibit this property, fluorite (chemically this mineral is calcium fluoride) being one. While the mechanism of light generation is not exactly clear, current thought on the matter is that when a hard crystalline material is broken into pieces (upon mechanical fracture), charge is separated momentarily in the material and light is produced upon discharge, or recombination, of the separated charges. So the answer to your question is "yes', the light is related to electricity in the sense that it seems to arise from flowing charges. By the way, WintOGreen Lifesavers exhibit the same behavior. You might want to give them a try.