MadSci Network: Astronomy |
I read that time dilates and light appears to travel slower when it passed through a strong gravity field. But does that affect accumulate if a light particle has to pass into and out of numerous gravity fields. Like when light leaves a quasar it climbs out of the high gravity and redshifts, and then gets lensed around a black hole, would it redshift again? Would the presence of dark matter be able to explain away the apparent expansion of the universe if the universe were uniformly occupied by dark matter, thus making light from large distances dilate proportional to distance due to gravity, rather than redshifting due to expansion.
Re: does time dilation add in series?
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