On Apr 7, 5:51 pm, Gene Fuller wrote:
The beams "interfere" but they do not "interact".

Of course, you can give examples where the waves survive the
superposition. But what we are talking about is when the waves do
NOT survive the superposition.

How about wave cancellation, Gene? When two coherent waves traveling
in the same direction in the same path with equal magnitudes and
opposite
phases interact, they cease to exist in the direction of the original
travel.
Ir's senseless to argue that waves that cease to exist during the
process
of superposition have not interacted with each other, don't you think?
--
73, Cecil, w5dxp.com