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Changing magnetic field?

  1. Mar 19, 2005 #1
    an electromagnetic wave of wavelength L is emanating from point A to point B. Small circles of wire of diameter L/2 are placed along AB. Will a current be induced in the circles of wire due to the changing magnetic field?
  2. jcsd
  3. Mar 19, 2005 #2
    Yeah sure, this is called an antenna.
  4. Mar 19, 2005 #3
    So this means that if A and B are sufficiently apart and only a given amount of photons ar e emitted then the light will never reach B since its energy will have been used up in producing currents?

    Does that also mean that light loses a good amount of intensity while coming from stars to earth as the space is not empty?
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