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LookingForDialga t1_j28azpq wrote

My first guess would be that they will be able to see each other because light doesn't need to follow a radial geodesic.

The only way to make sure is to write Schwarzschild metric, find the path of the two falling observers (you can assume radial geodesic) and then find all the possible null geodesics that cross a point of the trajectory of observer 1 and see if any of them also crosses the trajectory of the other observer.


s1ngular1ty2 t1_j28c8zw wrote

You'd actually use a penrose diagram and plot it out on there.