Indeed , one emerging school of thought is that a glass is simply the limiting case of a polycrystalline solid .
Similarly , the scattering of light in optical quality glass fiber is caused by molecular level irregularities ( compositional fluctuations ) in the glass structure .
One emerging school of thought is that a glass is simply the limiting case of a polycrystalline solid .
Similarly , the scattering of light in optical quality glass fiber is caused by molecular level irregularities ( compositional fluctuations ) in the glass structure .