I'll make it a little easier for you, Cecil. I' ll give you two ways to
determine Vfwd.

Way 1. Vfwd = sqrt(Power fwd x Zo)

Way 2. Vfwd = Vsource x sqrt[1/(1- rho^2)]

Now plug rho = 0.5 into the expression for Way 2 and see what comes up.

Walt

Cecil, let's take it one step further and include current, forward current, that
is, Ifwd.

Ifwd = Isouce x sqrt[1/(1 - rho^2)]

Now let's see what happens with a souce voltage of 70.71 v at 100 w on a 50-ohm
line. The source current is 1.414 a.

Now find Ifwd x Vfwd and see what comes up.

Walt