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A cavity is a hollow in an object. It may refer to:

In radio frequency resonance[edit]

  • Resonant cavity, a device designed to select for waves of particular wavelengths
  • Optical cavity, the cavity resonator of a laser
  • Microwave cavity or RF cavity, a cavity resonator in the radio frequency range, for example used in particle accelerators

Other uses[edit]

  • Cavity (band), a sludge metal band from Miami, Florida
  • Body cavity, a fluid filled space in many animals where organs typically develop
  • Cavity wall, a wall consisting of two skins with a cavity
  • Cavity method, a mathematical method to solve some mean field type of models

See also[edit]