How is the term 'shock wave' defined in explosive physics?

The term 'shock wave' is defined as a sudden change in pressure created by the rapid release of energy from an explosion. This phenomenon occurs when the energy released from the explosive reaction travels through the surrounding medium (such as air) and displaces that medium, resulting in a sharp, high-pressure front that propagates outward. The speed of the shock wave is greater than the speed of sound in that medium, which is what differentiates it from other types of waves, such as sound waves.

This definition aligns perfectly with the nature of explosives, where a rapid chemical reaction generates gases and heat, causing a significant and instantaneous increase in pressure. As the pressure wave moves outward, it can be destructive, leading to the potential for injury or damage to structures and people in the vicinity of the explosion. This is why understanding shock waves is crucial in explosives safety management.