High explosives are materials that detonate, producing a rapid and powerful explosion. They are characterized by their ability to create a shock wave that travels faster than the speed of sound. Common examples include TNT and RDX, which are used in military applications, demolition, and mining. These explosives require a specific trigger, such as a detonator, to initiate the reaction. High explosives are different from low explosives, which burn more slowly and are typically used in fireworks or propellants. Safety measures are crucial when handling high explosives due to their potential for causing significant damage and injury.