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    How often does mass effect space

    I just meant remove that mass from that location in space, and move it somewhere else. That area of the space was effected by the presense of the mass, and and if it was a one-time change how that space would know to return to not being effected. I'm not talking about all mass and all...
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    How often does mass effect space

    Isn't that something that has to be reconciled with QM?
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    How often does mass effect space

    I don't understand what you are saying here -- sorry. If "once" is enough per Einstein (and neglecting QM), then take the mass away abruptly. If the presence of the mass is not continually communicated, how does the local space know it is gone (maybe movement of mass VS presence of mass)?
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    How often does mass effect space

    I have a question about gravitation, that may be a "duh" question and apparent -- to everybody but me. Say that a mass effecting the geometry of space/time is the cause of gravitation, per what I understand about what Einstein said. Wouldn't that mean that the mass has to do this on a...
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    Light through a medium

    Good topic. The subject of light reflection and diffraction facinates me. This is what Richard Feynman says about it in his book "QED" (a grouping of lectures for a nontechnical audience). This passage isn't specifically about diffraction; it's about partial reflection of light through...
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    Diffraction pattern?

    Isn't this the same phenomina that can occur during a solar eclipse, where it's fairly dark outside, and sunlight shining through the spaces between leaves on a tree cause many projections of the sun to appear on the ground below?
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    Even another 2-slit experiment setup

    Hmmm .. I take back what I thought it would do, as if it did you could fashion a sort of Morse Code FTL communication. I don't know what it would do.
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    Even another 2-slit experiment setup

    I'm interested in knowing what would happen in this setup, if anybody knows. I don't have a way to make a diagram, but the setup is pretty easy. Say that in a central location, call it L, you have a source of entangled photons that emit one to the left side and the other to the right side...
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    On entanglement

    DrChinese, Question: How do we know these are truly random events VS pseudo random events of very close precision to random?
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    About violation of Bell's inequalities

    There is another way to look at this, that is actually quite amusing, to me at least. We don't know how, but we mostly accept it as "the way it is" and don't look any deeper into it when QM (nature) throws us randomness. Yet we almost become indignant and unaccepting (or, at least...
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    Blindness and wave collapse

    Please, feel free to read the passage from Dirac I cite, and either show where he's wrong or what he wrote doesn't apply to a physical meaning of superposition. The passage is only about 4 pages long. I'd type it up here but I'd have to get an OK from a board moderator first.
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    Blindness and wave collapse

    ZapperZ, Thanks, but I didn't see any links to the actual papers (not that I'd be able to understand them anyway) .. maybe I missed them though. I'll try to find them online, or maybe a trip to the library next week. Have you read the Paul Dirac chapter I wrote about?
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    Blindness and wave collapse

    ZapperZ, Were you being serious, or tongue-in-cheek??!?? Have any info on the "(i) the bonding-antibonding bonds in H2 molecule (ii) the coherence gap observed in the Stony Brook/Delft SQUID experiments." I'd like to read them.
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    Blindness and wave collapse

    RAD4921, Most of the people around here are a lot smarter about this than me, but since they ain't posting answers .. I'll try to. As far as I can see, this whole "conscious observer" thing rests on 2 dubious concepts: "Superposition" and "Collapse of the Wave Function". They're OK if you...
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    Mach's Principle

    masudr, My mistake. I thought you were making a point for MP. I don't believe it either. But, sometimes I think I'm looking at it wrong. Some of the accounts say that the origin of inertia is the "combined mass of the Universe". It might make more sense to term it as "the distribution...
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    Mach's Principle

    Then how would you reconcile that mass and inertia are supposed to be the same? In your scenerio there would be no inertia.
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    Mach's Principle

    But, that is something that can't be achieved, and leads to the question: If there was only 1 particle in the Universe, would it still have mass? If you believe in Mach's Principle, that gravitational and inertial forces are the same, how could you answer anything but "No"?
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    Mach's Principle

    From what I've read .. just popular accounts of it .. Einstein was enamored of Mach's ideas, tried to encorporate them in GR, but couldn't fully do it. And those accounts say that if the Universe is finite and unbounded, GR could fully encorporate Mach's Principle. From what I get out of MP...
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    Cause of this diffraction?

    Thanks for the lead. I did a google search on "fourier optics" and "spatial convolution", and it brought me to a bunch of info that's going to take me time to absorb (if I can understand it at all). It did bring me a pretty good site on optics...
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    Stephan's Quintet

    I see now. If you do forget about the blue for a moment, there is very little if any overlap on the green. It seemed to me the blue was a continuation of the green, not part of the spiral.
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    Stephan's Quintet

    Good point about there not being a distruption .. that makes sense. How could it be a line-of-sight-illusion though?
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    Stephan's Quintet

    The large pink galaxy on the bottom left. It's supposed to be a spiral, but by its orientation it takes a two-dimensional shape of an oval. The "green object" takes a pretty good bite out of the top-right side of it.
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    Stephan's Quintet

    http://www.spitzer.caltech.edu/Media/releases/ssc2006-08/" [Broken] The Spitzer Telescope views Stephan's Quintent. I remember reading a writeup Halton Arp had about this a time back (please, this is not the place for "shots" against him), that he thought the bottom left galaxy was actually...
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    Cause of this diffraction?

    I don't think so. If I'm careful I can barely see some with my eye pretty wide open .. my eyelashes shouldn't be effecting that. Plus, if I look up to a diffuse and wide light source, like a fairly rectangle light fixture on the bottom of a ceiling fan, the pattern changes to a wide smear of...
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    Cause of this diffraction?

    I love simple phenomina like this .. finding something "everyday" simple, and then trying to explain it or find a cause in scientific terms. I say it is diffraction, but I'm not sure. Here's the setup: In a darkened room light a small source of light, like a candle. Close one eye and with...
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    Quantum mechnics

    I'd bet the probability of winding up embedded half in/half out of the wall is greater than tunneling all the way through with it, so don't try this at home! :)
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    Does a bounded universe require more dimensions?

    Garth, I see. I don't know if this question is answerable or even makes any sense, but I'll ask it anyway: The GR expressions you use describing a 3 spatial dimension Universe, are they equivalent to what would be used in 4 spatial dimension math to describe a 3 spatial dimension...
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    Does a bounded universe require more dimensions?

    Did the original question ever get answered? I take it to be: For a 3 spatical dimension Universe that is finite and unbounded to expand, does that require a 4th spatial dimension within which to expand?
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    The n-th expansion question

    Plus, there are no "dots" in our 3-d spatial Universe, except for maybe particles by their lonesome. So, what you envision as a "dot" would really be an accumulation of particles. It then should be a question of whether the other forces overwhelm/keep those particles together over what is...
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    Horizons Misson - Questions

    Horizons Misson -- Questions I looked for a topic on this, and couldn't find one. If anybody else has questions about it, please feel free to post them here. If anybody knows ... I looked on the Horizons' web site but didn't find (easy) answers. In relation to the other two NASA probes...
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