Question

If `E` and `B` represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of eletromagnetic wave is along.
A. E
B. B
C. `B xx E`
D. `E xx B`

Answer 1

Correct Answer - D
The direaction of propagation of electromagnetic wave is perpendicular to both electric field vector E and magnetic field vector B, i.e. in the direaction of `E xx B`.
This can be seen by the digram given below .

Here, electromagnetic wave is along the z-direction which is given by the cross product of E and B.