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Spherical waves

  1. Mar 2, 2016 #1
    1. The problem statemeent, all variables and given/known data
    The field electric's electromagnetic wave issued by a strut isotropic source is:

    HTML:
    \vec{E} = E_{0} r_{0}*cos(ωt − kr) \vec{θ}
    Find the magnetic field in spherical coordinates

    2. Relevant equations
    I think, i use the equation
    HTML:
     \vec{B} = \frac{1}{w} \vec{K} \times \vec{E}
    But this equation use in planes waves, so for spherical waves too?
    3. The attempt at a solution
     
    Last edited: Mar 2, 2016
  2. jcsd
  3. Mar 3, 2016 #2

    Simon Bridge

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    Do you mean: ##\vec{E} = E_{0} r_{0}\cos(\omega t − kr) \hat{θ}## ?
    note: you seem to have ##\vec k\cdot\vec r = kr##

    You want to know if the equation ##\vec B = \frac{1}{w}\vec K \times \vec E## holds for spherical waves?
    I don't know what K and w stand for... but that equation does not look general to me.
    You could always go back to Maxwell's equations to see.
     
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