Cecil Moore wrote:


Hecht says interference
"corresponds" to the "interaction" of two or more
coherent EM waves "yielding a result ...".

I know from corresponding with you for many years that what someone
says, and what you understand them to say are not necessarily the same
thing. In instances such as this you apparently take whatever meaning
you wish from the words. Interference is not the particular kind of
"process" that you have in mind. There are many meanings to the words
'interaction' and 'process'. In the case of wave interference , the
words do mean that waves are 'doing things' to other waves.

73, ac6xg