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In a sinusoidal electromagnetic wave in a vacuum, the elect field has only an x-component. This component is given by: Eₓ = Eₘₐₓ cos(ky + ωt). This wave propagates in the A. Positive z-direction. B. Negative z-direction. C. Positive y-direction. D. Negative y-direction. E. Unknown direction.
Sagot :
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