anonymous
  • anonymous
Given two counter propagating monochromatic electromagnetic plane waves with equal strength and frequency but orthoganal polarization, (one is y polarized, the other is z polarized). More specifically, the z polarized wave is traveling in the positive x direction and the y polarized wave is traveling in the negative x direction. show that the polarization of the electric field changes along the x axis.
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
The z-polarized wave would be of the form \[E_0 e^{i(kx - \omega t)} \hat{z} \] and the y polarized wave would look like \[E_0 e^{i(kx + \omega t)} \hat{y}\] so what is their sum?
anonymous
  • anonymous
sure, you add them up you get a vector, but how do you show that the polarization changes along the x axis? I don't think i really understand the question.
anonymous
  • anonymous
You could show for instance that the sum of the two is \[E_0 e^{ikx} \left( e^{-i \omega t} \hat{z} + e^{i\omega t} \hat{y}\right) \] \[ = E_0e^{i(kx - \omega t)}\left(\hat{z} + e^{2i\omega t}\hat{y} \right) \] That's a wave but its polarization is kind of weird... can you visualize it?

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