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Re: Need more light

> So, how can a microscopic bit of finger oil make it shatter?
> The oil etches the glass, making it much more susceptible to shattering due
> to temperature changes.

It is my understanding that the oil has very different heat
transfer properties than the glass, and it acts like a heat
sink, thereby greatly increasing the temperature at very
localized spot, where the local glass section starts to expand,
but the glass area around the oil doesn't expand, and.....