Calcite, the most common form of natural calcium carbonate (CaCO3), a widely distributed mineral known for the beautiful development and great variety of its crystals.
A wavefront is a surface over which an optical wave has a constant phase. For example, a wavefront could be the surface over which the wave has a maximum (the crest of a water wave, for example) or a minimum (the trough of the same wave) value. The shape of a wavefront is usually determined by the geometry of the source.
The flow field can be approximated as a lead shock wave, followed by a 'self-similar' subsonic flow field. In simpler terms, a blast wave is an area of pressure expanding supersonically outward from an explosive core. It has a leading shock front of compressed gases.The blast wave is followed by a blast wind of negative pressure, which sucks items back in towards the center.The blast wave is harmful especially when one is very close to the center or at a location of constructive interference.High explosives, which detonate, generate blast waves.he blast wave is followed by a blast wind of negative pressure, which sucks items back in towards the center.