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Dipole radiation

  1. Dec 3, 2013 #1

    I an reading an interesting chapter of Feyman where he explains the basis of light-matter interaction with wave theory: http://cua.mit.edu/8.421_S08/Reading/Feyman_refr_index.pdf

    I didn't understand there one thing... to explain it he says that all the dipoles on the plate ''feel'' the same electric field with the same phase [page 4, equation 31.10]. to say this the plate has to be very very very thin [something like 0.1 of the wavelength]... how this can be practical??

  2. jcsd
  3. Dec 3, 2013 #2


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    Staff: Mentor

    On the first page, about halfway down, he writes:

    I added the boldface to point out the key word in his assumptions. He's assuming the plate is indeed very very thin, much less than a wavelength. It's not very practical, but one can build a more practical solution from it by integration.
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