On Tue, 4 May 2010 18:16:26 -0700 (PDT), K7ITM wrote:

For what it's worth... Do we have any way other than by observing
how a (E, M, or EM) field interacts with matter to measure a field?

Hi Tom,

You ask if we have "any way other... [than where a field] interacts
with matter." In a side thread, there is the discussion of heat. Heat
is a quasi-particle which means it does not exist as a physical
entity, but it acts like one (shades of photon duality). Heat is
wholly without matter, but in the whole absence of matter there is no
such thing as heat.

As to the remainder of the quote "to measure." This demands
physicality and your statement is self-negating in its plea.

If we rewind to the beginning of the plea, "observing" is a physical
interference described by Heisenberg. The bookends of your plea are,
then, doubly negating. That or (and here the thread returns to
metaphysics once again) interactions go unwitnessed - which is an
existential negation.

Expecting any reports from the Cat in the Box? Perhaps through an
entangled cat?

73's
Richard Clark, KB7QHC