Tom Donaly wrote:
You still got it wrong.

It's easy to say someone is wrong - why don't you
post the correct equation so we can discuss it?

Whether the (kx) term is a sine or cosine is a
function of where x=0. Whether the (wt) term
is a sine or cosine function is arbitrary.

Hecht in "Optics" uses this equation for a pure
standing wave:

E(x,t) = 2Eo1*sin(kx)*cos(wt)

Ramo and Whinnery write it a little differently:

E(z,t) = 2E+*sin(kz)*sin(wt)

My definition of Eo in my previous equation is
Eo = |E+|+|E-| = 2Eo1 = 2E+

E(x,t) = Eo*cos(kx)*cos(wt)

I fail to see anything wrong with that equation
for a pure standing wave.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com