A B
1000mW----| |
|----888.9mW----|
111.1mW----| |----790.1mW
|----98.76mW----|
87.79mW----| |
|----10.97mW
^^^^^

I would not even dream of superposing powers. Perhaps you
don't understand the role of the interference term in the

Then don't draw diagrams like above labeled with powers of
multiple reflections bouncing around in the same media

Eugene Hecht would be surprised to hear you say such since he
talked about the powers (irradiance) of various reflections in
the same media.

Only when dealing with the interference of TWO waves.
He works with electric field when discussing anti-reflection
layers. See 9.7.1

I'm not saying the power equation you give is wrong, but it
is correct for just two waves. With more than two waves, it
obviously becomes more complicated


Tor
N4OGW