The glass is often tempered since building codes sometimes dictate that home windows close to entry doors or any windows which are lower than 18 inches from the ground should use tempered glass. Tempered glass doesn’t break into harmful shards that may minimize and slice if the window breaks. Instead, it shatters into small rounded items that are simply swept up and put in the trash bin. Likely you’ve seen a police interrogation on television where officers are watching the interview unnoticed through a big pane of glass. The gentle inside the interrogation room is twice as bright as the …