Glass is an example of an amorphous solid. Amorphous solids are characterized by their lack of long-range order in their atomic structure. This means that the atoms in an amorphous solid are not arranged in a regular, repeating pattern like they are in a crystal. Instead, the atoms in an amorphous solid are arranged in a random, disordered fashion. Glass is an amorphous solid because the atoms in glass are not arranged in a regular, repeating pattern. Instead, the atoms in glass are arranged in a random, disordered fashion. This is why glass is transparent, because light can pass through glass without being scattered by the atoms in the glass.