Electromagnetic waves can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This 3D animation shows a plane linearly polarized wave propagating from left to right. Note that the electric and magnetic fields in such a wave are in-phase with each other, reaching minima and maxima together.
Wikipedia:
A pulsar (from is a highly magnetized rotating neutron star that emits a beam of electromagnetic radiation ....
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