JesseM wrote Light doesn't need to have mass to be affected by a black hole, since in general relativity you can explain the motion of light in terms of the the black hole curving spacetime, and light following a geodesic path in this curved spacetime. I replied as matter is sucked into a black hole the matter will begin to emanate light(photons). the light emanated may go in any direction even opposite to a vector pointing to the centre of the black hole. 2 problems I see one How does the light that is in no way following a geodeisc path suddenly start follwoing such a path back towards the black hole. 2 What phenomenon turns that photon thru 180 degrees so that it heads back to the black hole if it isnt gravity what is it? Also curved space time looks, in 2D, like a funny shaped funnel or cone. How do you consturct (pictorially or mathematically) a similar cone in all three dimensions such that light entering from any angle will travell in a geodeisic path? For this to be true the light would have to take a geodesic path regardless of the angle of attack! I find difficulty with this as if you take a single cone shape and rotate it thru all dimensions, cone 1 overlaps cones 2,3,4,5,6,7 etc etc and the cone shape, density, morphology, topology is compeletly destroyed? Pundits of the curved space theory beleive there is no such thing as gravity, do they. They beleive the illusion of gravity is created by curved space yes ? If this is so, You say massive objects bend space but any object no matter how tiny, as long as it exerts a garvitational "force" then it has gravity. So even tiny objects ie an electron must bend space, just less, yes ?