Question

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

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

Answer 1

The correct option is C

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

EM waves travels with perpendicular to E and B. Which are also perpendicular to each other $\overrightarrow{v}=\overrightarrow{E}\times \overrightarrow{B}$