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Multiple choice
According to the lesson, in a monochromatic electromagnetic plane wave in vacuum, how do the electric field E and magnetic field B oscillate relative to the propagation direction?
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Both E and B oscillate perpendicular to the propagation direction (the wave is transverse)
E and B oscillate 90 degrees out of phase in time, peaking at different instants
Both E and B oscillate along the propagation direction (the wave is longitudinal)
E oscillates along the propagation direction while B is perpendicular to it
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