I think you're referring to the little hole found near the bottom of the window. The window is actually made up of three panes. The inside middle plan has the hole in it, and the reason is equalize pressure on both sides.
So flight attendants can decided how to evacuate the aircraft in case of an emergency. For example if they were over water they would need to have passengers put their life vest on. We as if they...
You live in a cold climate and your windows are frosting up on the inside, right? What does it mean? It means you've got a source of moisture in the car. If you leave your windows "cracked" that...
Yes, up to a point all Glass windows block some degree of UV, incidentally normal (not sunglass type) eyeglasses block from 75% of available UV which is harmful. This also explains why there are no...