1. Ignition: When a firecracker is lit, a fuse ignites the explosive filling.
2. Rapid Combustion: The explosive compound quickly undergoes rapid combustion, producing large amounts of hot gases. This process occurs in a confined space within the firecracker.
3. Pressure Buildup: As the gases from combustion rapidly expand, they create a significant increase in pressure inside the firecracker.
4. Rupture and Expansion: The pressure inside the firecracker becomes too high for its casing to withstand. As a result, the casing bursts or ruptures, allowing the hot gases to escape rapidly into the surrounding air.
5. Sound Generation: The sudden and rapid release of high-pressure gases creates a shockwave in the air. This shockwave propagates outward as a sound wave, resulting in the characteristic popping sound of the firecracker.
It's important to handle firecrackers with caution, as they can cause injuries or damage if not used properly. Always follow safety instructions and regulations when using firecrackers.