Cecil Moore wrote:

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.

A standing wave is an amplitude vs position envelope. An amplitude vs
time envelope is modulation! :-)

ac6xg