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Homework Help: Monochromatic plane wave

  1. Apr 5, 2008 #1
    1. The problem statement, all variables and given/known data
    The B field of a monochromatic plane wave is

    B~=B0~ exp(i(kz-wt)[sqrt(3)/2 x-hat + 1/2 y-hat]
    Find E~ in terms of B0~.
    and the polarization angle.

    2. Relevant equations

    We know E~=Eo~ exp(i(k.r-wt)nhat
    B~=B0~ exp(i(k.r-wt)(k-hat x n-hat)

    nhat = cos(theta)xhat + sin(theta)yhat
    3. The attempt at a solution
    Would have been trivial if given E instead of B.

    What do I do?
  2. jcsd
  3. Apr 5, 2008 #2


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    [tex]{\b E}=-{\hat r}\times{\b B}[/tex] in gaussian units.
  4. Apr 5, 2008 #3
    Where is this formula from? What is it in SI?

    B= 1/c script r x E is true, i don't know about E = script r x B, where did u get this fomrula? Where is it in griffith if it is?
    Last edited: Apr 5, 2008
  5. Apr 6, 2008 #4


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    Do kXB in (9.49). You have to learn to do some things for yourself.
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