What is combustion?

Combustion is accurately defined as a chemical process of oxidation that produces both heat and light. This process typically involves the reaction of a fuel with an oxidant, usually oxygen, leading to the release of energy in the form of heat and light, which is characteristic of fire.

In combustion, the fuel undergoes a complex series of reactions that break down its molecular structure. As the fuel reacts with oxygen, new products like carbon dioxide and water are formed, along with the release of energy. This energy output is what provides the warmth we associate with fire and, when combustion occurs rapidly, it can produce flames, contributing to the phenomenon of light emission.

This understanding of combustion is fundamental in fire investigation as it helps identify how fires start and propagate. Recognizing the nature of combustion allows investigators to analyze fuel sources and the conditions needed for fire, which is crucial when determining the cause of a fire or understanding fire behavior in different environments.