Curious reflections of windows


I have noticed a very peculiar pattern or rather patters the reflections of windows of this office tower produced. We think of windows as rather perfectly flat and uniform and yet if you look at these reflections it is very clear there are significant variations between the quality of each individual window.

Perhaps one of the visitors here can explain this phenomenon.

PS: I have changed the colour scheme for this website to something a lot brighter to celebrate upcoming second anniversary of operations of the “Digital Photo Gallery” website. I hope you like it.