Keith Dysart wrote:
But at the points where the current or voltage is always
zero, it seems to me unnecessary to use the qualifier "*net*"
since the power IS always zero [from p(t)=v(t)*i(t)]. That
is, unless you are introducing another interpretation of
"*net*".

A standing wave is the *net* result of the superposition of
the forward wave and the reflected wave (without which the
standing wave would not exist). Anything, including power,
calculated using standing waves is necessarily a *net* result.
Superposed voltage is a net voltage. Superposed current is
a net current.
--
73, Cecil http://www.w5dxp.com