Flame

A flame is a visible, thermal-lighting phenomenon that occurs during combustion, which is a chemical reaction between a fuel and an oxidizer (like oxygen). When these substances react, they produce heat, light, carbon dioxide, and water. The light from a flame results from excited gases emitting photons as they return to lower energy states. Flames have different colors depending on the temperature and substances involved. They are common in fires, burners, and lanterns, serving to transfer heat and enable processes like cooking or metal melting. Essentially, a flame is the visible evidence of a controlled or uncontrolled chemical reaction producing heat and light.