Glass is a solid

Jul 30, 09:27 PM

It’s such a common misconception. I’ve even heard it repeated by some engineering students who should know better. But what is it about hearing something like ‘glass is a liquid and in old cathedrals’ windows it flows down’ become so easy to accept without evidence?

While the nature of glass may certainly be unclear, that doesn’t mean anything goes. It rests on a technical definition of a liquid as a disordered arrangement of atoms and molecules. While glass fits this definition clearly no one has ever seen glass flow at room temperature and should be taken to a solid, which it behaves like and is the far more important consideration. A little skepticism goes a long way. Perhaps it’s knowing that sometimes science produces counter-intuitive results and some fact like this could be just one of those sorts of things. (But it’s not.)

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