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If an electromagnetic wave propagating through vacuum is described by
P \( E=E_{0} \sin (k x-\omega t) ; B=B_{0} \sin (k x-\omega t) \).

W Which of the following equation is true?
(1) \( \mathrm{E}_{0} k=\mathrm{B}_{0} \omega \)
(2) \( E_{0} B_{0}=\omega k \)
(3) \( \mathrm{E}_{0} \omega=\mathrm{B}_{0} k \)
(4) \( E_{0} B_{0}=\omega / k \)
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