PhysicsMedium120×since 2002Q6732An electromagnetic wave in vacuum has the electric and magnetic field E→\mathop E\limits^ \toE→and B→\mathop B\limits^ \toB→, which are always perpendicular to each other. The direction of polarization is given by X→\mathop X\limits^ \toX→ and that of wave propagation by k→\mathop k\limits^ \tok→. ThenAX→∣∣B→\mathop X\limits^ \to ||\mathop B\limits^ \toX→∣∣B→ and X→∣∣B→×E→\mathop X\limits^ \to ||\mathop B\limits^ \to \times \mathop E\limits^ \toX→∣∣B→×E→BX→∣∣E→\mathop X\limits^ \to ||\mathop E\limits^ \toX→∣∣E→ and k→∣∣E→×B→\mathop k\limits^ \to ||\mathop E\limits^ \to \times \mathop B\limits^ \tok→∣∣E→×B→CX→∣∣B→\mathop X\limits^ \to ||\mathop B\limits^ \toX→∣∣B→ and k→∣∣E→×B→\mathop k\limits^ \to ||\mathop E\limits^ \to \times \mathop B\limits^ \tok→∣∣E→×B→DX→∣∣E→\mathop X\limits^ \to ||\mathop E\limits^ \toX→∣∣E→ and k→∣∣B→×E→\mathop k\limits^ \to ||\mathop B\limits^ \to \times \mathop E\limits^ \tok→∣∣B→×E→Check answerSkip