The intensity of a general electromagnetic wave is defined as the norm of its Poynting vector, represented mathematically as $$\vec{I}=\vec{S}=\frac{1}{\mu_0} \vec{E} \times \vec{B}$$. While intensity is typically understood as energy flux per unit time, it is crucial to consider the temporal average of this quantity for accurate measurements. The discussion emphasizes the importance of these definitions in understanding electromagnetic field behavior.
PREREQUISITESPhysicists, electrical engineers, and students studying electromagnetism who seek a deeper understanding of wave intensity and its implications in theoretical and practical contexts.