According to the Maxwell's electromagnetic wave theory, a vibrating magnetic field creates a vibrating electric field in right angle and this creates another vibrating magnetic field again in right angle and this kind of vibration of electric field and magnetic field make possible the propagation of light. However I think that to understand what are actually light or radio waves, we need to first investigate about why the magnetic field of a magnet are concentrated only around the magnet itself and why they have a very limited range?
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