ionospheric conductance

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Fukushima's Theorem — In physics, Fukushima s Theorem holds that for all points beneath the ionosphere the magnetic fields from field aligned currents and their corresponding Pederson currents exactly cancel. By superposition the total magnetic field at the ground is… … Wikipedia
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium
Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… … Universalium

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