Cecil Moore wrote:

[snip]

Since the generator is not delivering any power and there is
a forward power and a reflected power, the reflected power is
supplying the forward power, i.e. being 100% re-reflected. The
re-reflection is associated with total destructive interference
toward the generator and total constructive interference
toward the load. Anything else violates the conservation of
energy principle.

Cecil,

You have highlighted a really useful mathematical aid.

Namely, include the desired answer as a basic condition for setting up
the problem, and the proof becomes easy.

8-)

73,
Gene
W4SZ