Glass is basically a special kind of solid known as an amorphous solid. This is a state of matter in which the atoms and molecules are locked into place, but instead of forming neat, orderly crystals, they arrange themselves randomly. As a result, glasses are mechanically rigid like solids, yet have the disordered arrangement of molecules like liquids. Amorphous solids form when a solid substance is melted at high temperatures and then cooled rapidly — a process known as quenching.In an easy way it can also be answered as follows we can see through glass because light passes through it. Our eyes only see objects — chairs, the phone, your computer, or even tinted glass — by processing light waves reflected off the object or absorbed by it.