Question: Show that in a linear homogeneous, isotropic source-free region, both Es and Hs must satisfy the wave equation 2 A s + 2

Show that in a linear homogeneous, isotropic source-free region, both Es and Hs must satisfy the wave equation

∆2As + γ2As = 0

where γ2 = w2με – jwμσ and As = Es or Hs.

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