On Apr 7, 9:17 am, Cecil Moore wrote:
Keith Dysart wrote:
On Apr 6, 11:03 pm, Walter Maxwell wrote:

It is true, however, that two non-coherent fields from two different sources would just plow through each
other with no effect on either.

Can one not change the location of the nulls by changing
the phase relationship of the two sources?

If so, it would seem to me that two non-coherent fields are
simply fields without a constant phase relationship and as
such, the nulls are constantly moving; still present, but
not stationary.

If the waves are mutually incoherent, there is
NO interference which means no effect on each other.
Constructive and destructive interference is
impossible between two mutually incoherent waves
(under ordinary experimental conditions).

By "NO interference" did you mean "sufficiently close to zero
that it can be ignored for engineering purposes", or "exactly
zero"?

If the former, a bit more precision in your writing would be
valuable. The use of CAPITALs certainly suggests the latter.

If the latter, how incoherent do the waves have to be before
the interference suddenly drops to ZERO.

....Keith