A circularly polarized plane wave moving in the z direction has a finite extent in the x and ?? directions. Assuming that the amplitude modulation is slowly varying (the wave is many wavelengths broad), show that the electric and magnetic fields are given approximately by

where e₁, e₂, e₃ are unit vectors in the x, y, z directions.

Transcribed Image Text:

ӘЕ, ӘЕ, Е(х, у, г, г) %3D | Е.(х, у) (е, ie>) plkz-ist + дх ду В тiVде E Ενμε Ε