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  1. E

    Does universe expansion separate photons, traveling parallel?

    Just google tolman gravitation of light. Some relevant work shows up starting with the original 1931 paper.
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    Why is the light speed delay ignored by cosmologists?

    Yeah i agree marcus. It would make some sense if the photon energy was actually energy density, then the energy would be conserved, the spreading by redshift,etc.Also that would explain why the energy increased with frequency, because actually the energy density would be increasing...
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    Red Shift Issues

    FRW describes a uniform universe. So that equation would be right if there was no local space and all the metric was uniform,around us,the source and everything in between(so it just changed with time).I don't have a problem with that.But it's a different situation that I'm trying to describe...
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    Red Shift Issues

    Hi Wallace, Relatively speaking the boundary is quite sharp (compare the transition length versus the whole distance traveled, prob million vs billion light years). "Redshift is caused by the metric being different for the emitter and observer." I agree with that.That was what i was trying to...
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    Red Shift Issues

    Yeah that is not correct. Since I made the images for a curved space, i thought it would be more intuitive to talk in terms of curvature. Yet..:)..I still have the issue with light traveling across a metric jump.Basically you're implying that regardless of the extent of the spatial change in...
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    Red Shift Issues

    Thanks for the clarification. I guess my confusion comes from the fact that scale factor is a function of local curvature in friedmann equations. So I assumed that at the boundaries between int. space and local spaces, the sudden spatial change in the curvature and the resulting metric would...
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    Red Shift Issues

    To clarify things Hi, I tried to make it clear but let me try again. First for wallace-local space is the area in our vicinity where there's little or no hubble flow due to local gravitation and includes milky way etc. Likewise, the source has a similar area within its galaxy which means the...
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    Red Shift Issues

    I have some issues with the current understanding of the cosmological red shifts and their interpretation using the spatial variation in the metric with time.To make the argument clear, i'm also posting pictures. The universe is depicted as the surface of a sphere but that doesnt affect the...
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