Properties of EM Waves: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Properties of EM Waves. Understanding the underlying formula is key to arriving at the correct answer below:

The direction of propagation of an electromagnetic wave is parallel to the Poynting vector, given by the cross product $\bar{E} \times \bar{B}$ . For option a, $\hat{i} \times \hat{j} = \hat{k}$ , which corresponds to the +z axis.