A) \[[\mathbf{E}={{E}_{0}}\mathbf{\hat{k}},\mathbf{B}={{B}_{0}}\mathbf{\hat{i}}]\]
B) \[[\mathbf{E}={{E}_{0}}\mathbf{\hat{j}}\,,\mathbf{B}={{B}_{0}}\mathbf{\hat{j}}\,]\]
C) \[[\mathbf{E}={{E}_{0}}\mathbf{\hat{j}}\,,\mathbf{B}={{B}_{0}}\mathbf{\hat{k}}\,]\]
D) \[[\mathbf{E}={{E}_{0}}\mathbf{\hat{i}}\,,\mathbf{B}={{B}_{0}}\mathbf{\hat{j}}\,]\]
Correct Answer: D
Solution :
\[\mu =\mathbf{E}\times \mathbf{B}\]\[={{E}_{0}}\,\mathbf{\hat{i}}+{{B}_{0}}\,\mathbf{\hat{j}}={{E}_{0}}{{B}_{0}}\,\mathbf{\hat{k}}\] \[\mathbf{E}\,\times \mathbf{B}\]points in the direction of wave propagation.
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