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The electric field of a uniform plane electromagnetic wave in free space, along the positive $x$ direction, is given by $\overrightarrow{E}=10(\hat{a}_y+j\hat{a}_z)e^{-j\:25x}$. The frequency and polarization of the wave, respectively, are

  1. $1.2\:GHz$ and left circular
  2. $4\:Hz$ and left circular
  3. $1.2\:GHz$ and right circular
  4. $4\:Hz$ and right circular
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