A plane electromagnetic wave propagating along $x$-direction can have the following pairs of $E$ and $\mathbf{B}$a) $E _x, B_ y$b) $E_y, \mathbf{B_ z}$c) $\mathrm{B_x}, \mathrm{E_y}$d) $E_z, B_y$
A plane electromagnetic wave propagating along $x$-direction can have the following pairs of $E$ and $\mathbf{B}$ a) $E _x, B_ y$ b) $E_y, \mathbf{B_ z}$ c) $\mathrm{B_x}, \mathrm{E_y}$ d) $E_z, B_y$
A plane electromagnetic wave propagating along $x$-direction can have the following pairs of $E$ and $\mathbf{B}$ a) $E _x, B_ y$ b) $E_y, \mathbf{B_ z}$ c) $\mathrm{B_x}, \mathrm{E_y}$ d) $E_z, B_y$