Q. An electromagnetic wave in vacuum has the electric and magnetic field $\overrightarrow{E}$ and $\overrightarrow{B}$, which are always perpendicular to each other. The direction of polarization is given by $\overrightarrow{X}$ and that of wave propagation by $\overrightarrow{k}$. Then
A) $\overrightarrow{X}||\overrightarrow{B}$ and $\overrightarrow{k}||\overrightarrow{B} \times \overrightarrow{E}$
B) $\overrightarrow{X}||\overrightarrow{E}$ and $\overrightarrow{k}||\overrightarrow{E} \times \overrightarrow{B}$
C) $\overrightarrow{X}||\overrightarrow{B}$ and $\overrightarrow{k}||\overrightarrow{E} \times \overrightarrow{B}$
D) $\overrightarrow{X}||\overrightarrow{E}$ and $\overrightarrow{k}||\overrightarrow{B} \times \overrightarrow{E}$
Explanation
The correct answer is Option B: $\overrightarrow{X}||\overrightarrow{E}$ and $\overrightarrow{k}||\overrightarrow{E} \times \overrightarrow{B}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.