Question

why is glass considered as a super cooled liquid

Answer 1

Because it is transparent as water and also the phenomenon like refraction etc are possible in glass as like in liquids like water.
Hope this helps you......☺

Answer 2

Hey !!

We know that, Glass is an Amorphous solid. Like liquids, it has a tendency to flow, though very slowly. This is evident from the fact that the glass panes in the windows of old buildings are invariably found to be slightly thicker at the bottom than at the top. This is because the glass flows down very slowly and makes the bottom portion slightly thicker.

Hope it helps you !!