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.
See also â antinode â longitudinal wave â node â standing wave â transverse wave. 15 (Physics) a graphical representation of a wave obtained by plotting the magnitude of the disturbance against time at a particular point in the medium or space; waveform.