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Chapter 9: Electromagnetic Waves The Wave Equation
Plane Waves Traveling in an Arbitrary Direction There is nothing special about the z direction---we can generalize to monochromatic plane waves traveling in an arbitrary direction. The propagation (or wave) vector, k: pointing in the direction of propagation. Generalization of kz: using the scalar product k·r. () 0 (,) ˆ the polarization vector
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