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...c]] field wave. Conversely, during reception, the oscillating electric and magnetic fields of an incoming radio wave exert force on the electrons in the antenn ....wikipedia.org/wiki/James_Clerk_Maxwell James Clerk Maxwell]. Hertz placed dipole antennas at the [[focal point]] of [https://en.wikipedia.org/wiki/Parabolic

...e bound by weaker [[Intermolecular force#Dipole-dipole interactions|dipole-dipole interactions]].

...as to the formation of the [[ozone layer]] which, together with Earth's [[magnetic field]], blocks harmful radiation, permitting life on land. ...ly solid [[Mantle (geology)|mantle]], a liquid outer core that generates a magnetic field, and a solid iron [[inner core]].