Jim Kelley wrote:
Cecil Moore wrote:

How do two waves cancel without interacting?

No interaction is required in order for fields to cancel. Only that
they occupy the same space at the same time and be of the correct
amplitude and phase.

Interaction is certainly required for them to cancel forever.
Otherwise, we have all these energyless phantom ghost waves
existing forever.
--
73, Cecil http://www.w5dxp.com