On Sun, Nov 12, 2017 at 1:01 AM, <agrayson2...@gmail.com> wrote: > > What is your definition of non-realistic? >
Nonrealistic means when something is not being observed it doesn't exist in any one definite state. A photon hits a horizontally polarizing filter and the universe splits in two if Many Worlds is right, in one the photon makes it through the filter and the inhabitants of that world conclude it is 100% horizontally polarized , in the other world it doesn't get through the filter and they conclude it must have been 100% vertically polarized, but in the world before the split, before it hit the filter, the inhabitants of that world would conclude (if they believed in Many Worlds) that the photon did not have any one definite polarized state at all. >> >> >> That is not unique to the MWI. In a accelerating Einsteinian universe >> such as ours energy is not conserved at the cosmological level. >> > > > > There was some unique condition that gave rise to our universe. > The multiverse may have always existed, if so then nothing, unique or otherwise, gave rise to it, > > > MWI has it happening wily-nily when someone performs a slit experiment in > a lab (and uncountably many times). Hardly a conservative interpretation > IMO. > Many Worlds is very conservative if the mathematics doesn't say anything about a wave collapse. And it doesn't. >> >> they can't even say what is observation is. >> > > > > I can. They can. In a SG experiment, e.g., an observation occurs when the > electron's spin state is aligned, or anti-aligned to the magnetic field. > Observation is the wrong word if no observer is involved, then its just a change and a change is the criteria Many Worlds uses. In MWI everything that can happen does happen, so when a photon approaches 2 slits the universe splits and one photon goes through the right slit and one goes through the left slit. If after that the photons hit a photographic plate (or a brick wall) then the photons no longer exist in either universe and so they merge back together into one universe and this merger causes the interference lines. If instead after passing the slits there is no photographic plate (or brick wall) and the photons are allowed to continue on into infinite space then the 2 universes remain different and remain separated forever. The universe splits because there is a difference, in one the photon went through the left slit and in another it went through the right slit, and the wave function never collapses it just keeps on going. And there is nothing special about me, I split just like everything else in the universe, the fact that I am conscious is irrelevant. That's another great advantage of Many Worlds, unlike Copenhagen it doesn't need to explain what consciousness is or how it works because consciousness has nothing to do with it. > >> >> Can only a person make a observation or can a cockroach collapse the wave >> function too? >> > > > > Feynman is conclusive on this point. No person or cockroach needed; just > an instrument to record the result. > If an instrument is anything that can exist in at least 2 states then I would be fine with that, but that sounds much more like Many Worlds than Copenhagen. All that's needed is a change, any change, it need not be anything as dramatic as a change in something as complex as a brain. > > Does every event require an observer or instrument to witness it? I think > not. > I think ever observation requires a observer to witness a change, and Copenhagen requires an observation to trigger the collapse of the wave function. Many Worlds just requires a simple change to trigger a split, a change in anything, and nothing triggers the collapse o f the wave function because the mathematics doesn't even hint at such a thing happening, the Copenhagen people just tacked that on. Somebody said that Many Worlds is cheap on assumptions but expensive in universes and I think that's true, I'm a fan because universes are cheaper than assumptions. John K Clark -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
