Physics - EM Waves Question with Solution | TestHub

The electromagnetic wave is propagating along the +z axis.
Since the electric and magnetic fields are perpendicular to each other and also perpendicular to the direction of propagation of wave.

$\text{Also,}\overrightarrow{E}\times \overrightarrow{B}$gives the direction of wave propagation.

$\overrightarrow{E}=E{}_0\hat{\mathrm{i}}\text{,}B=B{}_0\hat{\mathrm{j}}\left(\because \hat{\mathrm{i}}\times \hat{\mathrm{j}}=\hat{\mathrm{k}}\right)$