Question

Give reson -: window glass of old building look milky

Answer 1

as old buildings
glass complete
will be thick at bottom then at top

Answer 2

Glass is an amorphous solids and it is also called supercooled liquid.Hence like liquids it has tendency to flow. therefore in old buildings the bottom of the glass panes look milky in appearence or thicker because glass over the years flown down under the influence of gravity.....