[deleted]
Hi Georgina,
"So is it a 3 dimensional source object in a single 3 dimensional space? How are the dimensions to be oriented?"
From the perspective of my incredibly simplistic view of the universe, this question is too complicated. Here's my simple view, fwiw:
1.) The universe is comprised of a whole big bunch of "stuff" bumping around "out there" (i.e., apart from the bits and pieces which are myself, myself being just an infinitesimally tiny portion of the totality of the stuff).
2.) There is some real, evolving relationship among all the various bits and pieces (and yes, EM data are a part of all the stuff).
3.) The instantaneous nature of these evolving relationships is intrinsically unknowable to me, *not* because the instantaneous relationships do not exist, but solely because of limitations imposed on me by the nature of sensory data for which I'm equipped to be conscious/aware).
4.) The relationships among all the various bits and pieces appear *not* to evolve randomly; rather, this evolution appears to be governed by rules with we strive to understand and which we refer to as the laws of physics.
5.) Regardless of whether this evolution progresses in quantum steps or continuously (still to be determined), this evolution constitutes the "history" of the universe.
6.) Empirical observations available to me lead me to conclude that the universe has one, and only one, real history.
7.) Due solely to limitations imposed by sensory data (as discussed in point 3 above), every observer of the universe will *perceive* its evolution differently.
8.) Observers such as human beings have developed the ability to think about and to interpret their empirical observations and to communicate these interpretations with one another in a way which allows them to form, incrementally, increasingly better understandings of the universe in which they find themselves.
This has been an incredibly complicated way to convey to you what is an incredibly simple view of the universe. But sometimes it's useful to spell things out carefully; we may take for granted that these things are "obvious," but they may not be obvious to others, who may think that what is obvious to them is contradictory to what is obvious to us. The only way to get to the root of it is to use our words carefully.
"The way to converge with each other is to converge upon the truth." (David Deutsch, 'The Beginning of Infinity')
I'll close by sharing another favorite quote:
"What guarantees the objectivity of the world in which we live is that this world is common to us with other thinking beings. Through the communications that we have with other men, we receive from them ready-made reasonings; we know that these reasonings do not come from us and at the same time we recognize in them the work of reasonable beings like ourselves. And as these reasonings appear to fit the world of our sensations, we think we may infer that these reasonable beings have seen the same thing as we; thus it is we know we have not been dreaming." (Henri Poincare, 'The Value of Science,' published in 1913.)
Cheers,
jcns