If `vec(E )` and `vec(B)` represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of electromagnetic wave is along

Options

A. `vec(E )`
B. `vec(B)`
C. `vec(B)xx vec(E )`
D. `vec(E )xx vec(B)`

Answer

D

Explanation

Direction of propagation of electromagnetic waves is perpendicular to both electric field vector `vec(E )` and magnetic field vector `vec(B)`. From right hand screw rule it is in direction of `vec(E )xx vec(B)` which is shown in figure.

Here electromagnetic wave is in z - direction. Which is given by cross product of `vec(E )` and `vec(B)`.