The Small Hole In The Windows Of The Aircraft
Before we talk about its usefulness, we have to understand the components of the window. According to the Bright Side site, aircraft windows are made of two layers, one of plastic, and the other of glass. The internal glass panel can be destroyed because of the large difference in pressure between the cabin and the atmosphere outside. The function of this hole lies in allowing pressure to move between the cabin of the aircraft and the external atmosphere across the boards evenly to equalize the pressure.