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modphysnoob

E cross H= Power Curl(E cross H)=H (curl E)- E(Curl H) H ( -dB/dt ) -E( J+ dD/dt) for some reason they say J=0 , I don't get why?

  • one year ago
  • one year ago

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  1. modphysnoob
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    @Preetha

    • one year ago
  2. Anonymous1921
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    J depends on what material is used. In free space there are no electric charges, and hence J equals to zero.

    • one year ago
  3. Vincent-Lyon.Fr
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    (same answer as Anonymous1921) If you use this equation with reference to an electromagnetic wave travelling in a vacuum, there is not current there, so J = 0

    • one year ago
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