State the uses of amorphous solids and describe the cleavage property of amorphous solids.

(N/A) $1$. Amorphous solids like glass,rubber,and plastics are widely used in our daily life.
$2$. Amorphous silicon is one of the best photovoltaic materials available for conversion of sunlight into electricity.
$3$. Cleavage property: When cut with a sharp-edged tool,amorphous solids cut into two pieces with irregular surfaces. They do not show a clean cleavage.