#### PeterDonis

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Since nobody has actually done the math, everything we've said about the outcomes is just our best guess. To know for sure what the outcome is, as has already been pointed out, you need to do the math.Is there still some disagreement about what the outcome would be?

From the point of view of an observer "hovering" at rest relative to the hole, yes. Aberration depends onWill the relativistic aberration cause a higher and higher % of total photons to travel on vectors which increase in distance from the black hole over time

*relative*velocity.

As above, you need to do the math and see if you want to know for sure. But intuitively, we can look at it from two points of view:will the photons become redshifted from gravitational redshift during their flight times between craft?

From the point of view of the ships, they are all in free fall and are all at rest relative to each other, so there is no such thing as "gravitational redshift". However, if their separation is large enough, spacetime curvature might be detectable between them during the time of flight of a particular photon, which would mean the logic of the previous sentence wouldn't be quite right (since it assumes that the entire fleet can be contained within a single local inertial frame during the flight time of a photon).

From the point of view of an observer "hovering" at rest relative to the hole, since all of the spaceships are in free fall, they are decelerating, so while a photon will have gravitational redshift as it travels upward, the ship that receives it will have decelerated during its flight, which will cause a compensating blueshift (which is an effect I didn't think of when I originally posted about gravitational redshift). However, without doing the math, we don't know for sure that those two effects exactly cancel (though it seems intuitively like they should).