Diffusion flames occur when fuel and oxidizer mix in the air before combustion. In this type of flame, the fuel vaporizes and diffuses into the surrounding oxygen, allowing for a gradual reaction. This process is common in everyday situations, such as burning candles or gas stoves, where the fuel is released and ignited in the presence of air. These flames are characterized by their yellow or orange color, which results from the incomplete combustion of carbon particles. The temperature and stability of diffusion flames can vary based on factors like fuel type and airflow, making them important in applications like industrial burners and fire safety.