On Jan 10, 2:25 pm, Jim Kelley wrote:
So much for the Poynting vector of a position envelope. What are your
thoughts regarding the Poynting vector for a time varying envelope of
an electromagnetic wave? :-)

If the wire runs in the 'x' direction, the standing wave phasors
rotate only in the 'yz' plane. Since the Poynting vector is always
normal to the E-field and H-field, seems the instantaneous value of
the Poynting vector for a standing wave is still zero.
--
73, Cecil, w5dxp.com