Question

The direction of propagation of an electromagnetic plane wave is ______.

Options

• perpendicular to both electric field vector and the magnetic field vector

• only perpendicular to magnetic field vector

• only perpendicular to electric field vector

• parallel to both electric field vector and the magnetic field vector

Answer 1

The direction of propagation of an electromagnetic plane wave is perpendicular to both electric field vector and the magnetic field vector.

Explanation:

The Pointing vector, which is defined by `vec"E" xx vec"B"`, refers to the direction of propagation of the em wave. As a result, it is parallel to both field vectors.