Channel: Research and development
Do cathedral windows flow in human time scales?

1999-03-10 | Old issues

Up to now it has been common belief that glass in windows may, even at ambient temperature, "flow" downwards over long periods of time, pulled by the force of gravity. The idea is based on reports that old stained glass windows are thicker at the bottom than at the top. In this article, Brazilian scientist Edgar Dutra Zanotto uses basic concepts of physics to assess whether there is any truth in the theory, and comes to some surprising conclusions.

Article taken from Glass-Technology International bi-monthly magazine (6 issues per year)

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