Les, that phenomenon, found in windows from medieval buildings, has been shown to be an artifact of how the glass was made at the time, and not due to flow. Further, the amount of glass flow ascribed to those windows would, by calculation, require billions of years.
Les, that phenomenon, found in windows from medieval buildings, has been shown to be an artifact of how the glass was made at the time, and not due to flow. Further, the amount of glass flow ascribed to those windows would, by calculation, require billions of years.
Darn, my education is obviously getting dated, probably like me. I was taught in some materials class or other that it was a supercooled liquid. and flowed with time. Made me go and search myself. http://www.glassnotes.com/WindowPanes.html Hardly an exhaustive search of the subject by any means though Wikipedia has similar statements. Apologies to all for spreading myths.
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