Recent content by zql

  1. Z

    Poynting vector in static electromagnetic field

    And how about "hidden momentum"? I didn't know about this.
  2. Z

    Poynting vector in static electromagnetic field

    I think I got it, thanks.
  3. Z

    Poynting vector in static electromagnetic field

    can you give me more details？thanks.
  4. Z

    Poynting vector in static electromagnetic field

    There is a situation, we have an electric field and a magnetic field, both are static. And we know the density of energy is u=E·D/2+B·H/2, so dU/dt=0, but Poynting vector S=ExH is not zero, which means energy is flowing. This confused me. Static field also has energy flux?
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