(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Given the following EM wave propagating in vacuum, find the direction along which the electric field oscillates and the direction of propagation of the wave:

[tex] \vec{E} = (-3\hat{i} + 3\sqrt{3}\hat{j}) 10^4 e^{i[\frac{\pi}{3} (\sqrt{5}x + \sqrt{5/3} y10^7 - 8.1246 *10^{15} t]} [/tex]

Btw how can I prevent the thread template from reappearing every time I click preview post? It is quite annoying.

3. The attempt at a solution

I understand the electric field oscillates along the direction [itex]-1\hat{i} \sqrt{3}\hat{j}[/itex], by looking at the amplitide. But how do I determine the direction of propagation from the phase argument? Do I just treat the x and y in the phase as if they were unit vectors of [itex]\vec{k}[/itex]?

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# Homework Help: EM wave propagation direction.

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