#field_of_force__field__force_field__forcefield  the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
  supertype:  #physical_phenomenon  a natural phenomenon involving the physics of matter and energy
  subtype:  #electric_field  a field of force surrounding a charged particle
     subtype:  #electrostatic_field__electrostaticfield  electric field associated with static electric charges
  subtype:  #gravitational_field__gravitationalfield  a field of force surrounding a body of finite mass
  subtype:  #magnetic_field__magnetic_flux__flux  the lines of force surrounding a permanent magnet or a moving charged particle
     subtype:  #magnetosphere  the magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field
     subtype:  #solar_magnetic_field  the magnetic field of the sun
  subtype:  #radiation_field__radiationfield  a field that represents the energy lost from the radiator to space

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