Primary wave

Primary shaft is used in the following contexts:

• In earthquake geology, see sky waves
• In physics, the wave system of a ship consists of bow congestion, subsidence, primary wave (= swell) and secondary wave
  • the Snell's law also defined primary and secondary waves, see there acoustics
  • the Navier-Cauchy equations also know primary waves, see wave equations there
  • In meteorology, thermal waves are also referred to as a wave system in which primary waves occur, see Wolf Hirth : Biography
  • In mechanics, engine and gear manufacturing knows primary and further shafts, see shaft (mechanics)

This is a disambiguation page for differentiating between several terms identified with the same word.