John Popelish wrote:
If you can measure phase, you can see that it is opposite on opposite
sides of a node. There is a 180 degree phase shift each time the
measurement passes over a node. Do you disagree?

Yes, but you can tell that from the amplitude being zero.

That's exactly the difference. But if you measure a single point, you
can't tell whether you are measuring a point on a traveling wave or a
standing wave. Agree?

I agree but who would be stupid enough to measure just a single
point? One could wear a blindfold and use no hands and have an
even greater challenge.
--
73, Cecil http://www.qsl.net/w5dxp