sci.physics.electromag

Sal M. Onella wrote:
> Such a quantum structure would not be coupled to the presence of matter. It
> would exist without mass.

It could be the dark energy thought to make up ~65%
of the universe and be responsible for the universal
expansion of "empty" space.

> The universe has discrete boundaries.

The volume of the universe could be *unbounded* and
finite, as is the surface area of the earth.

> If EM waves reaching the boundary really do not escape and are not reflected
> (???) then the boundary is absorbing them and has a theoretical impedance
> of 377 ohms (same as what we innocently calculate for 'free space').

One can travel forever on the finite surface of the
earth without ever reaching a boundary. Without changing
direction on the two-dimensional surface of a sphere, one
simply arrives back at one's starting point. (The East
Indies can be reached by going the opposite direction.)

One can probably travel forever within the volume of a
finite universe without ever reaching a boundary. One
might even arrive back at one's starting point while
traveling only in a "straight line".
--
73, Cecil