Dear Mr. Cecil Moore,
I think now I understand the notation.
If
| ...
| a1*a2 is phasor multiplication, a1*a2*cos(theta)
| ...
then s11*a1*s12*a2
is s11*a1*s12*a2*cos(phi)
which has the same meaning as the
Re{[s11*a1]*Conjg[s12*a2]}
and the only thing which remains
is the specification of the phi range of values.
I think also,
I grasped your point of view
for the existence of a deeper, common, base between
these different physical phenomena,
with which anyone hardly disagrees.
Finally,
I would ask you to tell me please,
the reference details to
Dr. Best's QEX article and Hecht's _Optics_.
Thanking you in advance,
pez
SV7BAX
TheDAG
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