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So paleomagnetism can really be thought of as the study of an ancient magnet field. Some of the strongest evidence in support of the theory of plate tectonics comes from studying the magnetic fields surrounding oceanic ridges.
Levitating pyrolytic graphite. Diamagnetism is a form of magnetism which is only exhibited by a substance in the presence of an externally applied magnetic field. It is the result of changes in the orbital motion of electrons due to the application of an externally applied magnetic field.erromagnets are attracted to field maxima, which do not exist in free space. Diamagnetism is an induced form of magnetism, thus the magnetic moment is proportional to the applied field B. This means that the magnetic energy of diamagnets is proportional to B 2, the intensity of the magnetic field.