question_answer

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

A) \[\overset{\to }{\mathop{{}}}\,\]

B) \[\vec{B}\]

C) \[\vec{B}\,\times \,\vec{E}\]

D) \[\vec{E}\,\times \,\vec{B}\]

Correct Answer: D

Solution :

Option [d] is correct.

Explanation: The direction of propagation of electromagnetic wave is perpendicular to \[\vec{E}\] and \[\vec{B}\] both and by right thumb rule.

The direction of propagation of electromagnetic wave is perpendicular to both the electric field vector \[\vec{E}\,\,and\,\,\vec{B}\] magnetic field vector B, i.e., in the direction of \[\vec{E}\,\,and\,\,\vec{B}\].

Here, electromagnetic wave is along the z-direction which is given by the cross product of\[\vec{E}\,\,and\,\,\vec{B}\].