- #1
Mike2
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As the universe expands and disperses, there is less of a gravitational well for photons to climb out of before they reach us. Photons from the early universe must climb out of the gravity well of a more densely populated universe than photons emitted from sources today. Therefore early photons would have to appear more redshifted than later photons since they loose more of their energy by climbing out of a deeper universal gravity well, right?
And the change of the potential that a photon must climb out of would not be linear either? I imagine that there would be less of a change of the potential of the univeral gravity well today than earlier, right? Wouldn't this make it appear as if the emount of redshift is decelerating, or that the universe is accelerating? Thanks.
And the change of the potential that a photon must climb out of would not be linear either? I imagine that there would be less of a change of the potential of the univeral gravity well today than earlier, right? Wouldn't this make it appear as if the emount of redshift is decelerating, or that the universe is accelerating? Thanks.