If E and B are the electric and magnetic field vectors of electromagnetic waves then the direction of propagation of electromagnetic wave is along the direction of:
Answer & explanation
Correct answer: option 3
If $\vec{E}$ and $\vec{B}$ represent electric and magnetic field vectors of electromagnetic wave, then the direction of propagation of electromagnetic wave is along the direction of vector $\vec{E} \times \vec{B}$. The vector product $\vec{B} \times \vec{E}$ gives the negative direction of the propagation of wave.