Question

If $\overrightarrow{E}$ and $\overrightarrow{B}$ are the electric and magnetic field vectors of electromagnetic waves then the direction of propagation of electromagnetic wave is along the direction of:

• A. $\overrightarrow{E}$
• B. $\overrightarrow{B}$
• C. $\overrightarrow{E}\times \overrightarrow{B}$
• D. None of the above

Answer 1

Answer: (C)

$\overrightarrow{E}\times \overrightarrow{B}$

The direction of propagation of electromagnetic wave is perpendicular to the variation of electric field $\overrightarrow{E}$ as well as to the magnetic field $\overrightarrow{B}$