- #1
Firben
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Homework Statement
Im stuck on a old exam in plasma physics. It is about how to determine dispersion relations for high frequency waves in cold plasma's. I'm not sure how they do in the solution manual.
Homework Equations
B = B_0z^
E = E_0exp(i(kx-wt))z^
The Attempt at a Solution
The solution manual:
http://s716.photobucket.com/user/Pitoraq/media/IMG_20170512_170136_zps0e1g7onu.jpg.html
My attempt to find the solution:
http://s716.photobucket.com/user/Pitoraq/media/IMG_20170512_170131_zps2f7nwaui.jpg.html
My question is marked "why" in the above link. Why is S^2 - D^2 = 1 ?