On Dec 30, 9:42*am, Cecil Moore wrote:
Bottom line: At points '+' in the example before any
cutting, either reflections exist or they don't.

If reflections exist, there has to exist an impedance
discontinuity to cause the reflections. There is no
impedance discontinuity.

If reflections don't exist, there is nothing to change
the direction of the flowing energy. Therefore, energy
is flowing both ways through the '+' points.

Now there's a bit of a pickle. You previously agreed
that
P(x,t) = V(x,t) * I(x,t)
but now you claim that there is energy flowing.

If you do not accept that P = V * I, please clearly
state so. The discussion could then continue with
the more basic issue.

The *NET* energy flow is zero.

NET energy flow is not defined in your favourite
reference: the IEEE dictionary.

How does it differ from "instantaneous power" for
which the IEEE does have a definition (P=V*I, if
you are interested)?

But it is easily proven that energy is flowing
from one SGCL to the other.

It would be wonderful if you could provide this
easy PROOF since such a proof would settle the
question.

...Keith