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.

$\overrightarrow{E}=E_0\widehat{i}\text{,}B=B_0\widehat{j}\left(\because \widehat{i}\times \widehat{j}=\widehat{k}\right)$