Concept:White phosphorus glows due to a slow chemical reaction with oxygen, known as chemiluminescence.
Explanation:White phosphorus is chemically very reactive.
When exposed to air, it slowly combines with atmospheric oxygen.
This slow oxidation releases energy in the form of faint visible light.
The glow is observed only in a dark room that contains oxygen.
Other properties like amorphous structure or high ignition temperature do not cause the glow.
The phenomenon is called chemiluminescence.
It is not a fast combustion but a slow surface oxidation.
Answer:Slow oxidation.