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# An electro magnetic wave travels in vacuum along z direction $\overrightarrow{E}=(E_1 \hat i +E_2 \hat j) \cos (kz- wt)$ Choose the correct option from the following

$\begin{array}{1 1} \text{The given electro magnetic field is circularly polarized} \\ \text{The given electro magnetic wave is plane polarized} \\ zero \\ \text{none of these} \end{array}$

It is given that $\overrightarrow{E}=(E_1 \hat i +E_2 \hat j) \cos (kz- wt)$
In EM wave that associate magnetic field vector $\overrightarrow{B} = \large\frac{$\overrightarrow{E}}{C}=\frac{E_1 \hat i +E_2 \hat j}{C} \cos (Kz-wt)$option a is true Also$\overrightarrow{E}$and$\overrightarrow{B}$are perpendicular to each other and the propagation of EM wave is perpendicular to$\overrightarrow{E}$as well as$\overrightarrow{B}\$