Light is subject to escape velocity the same as matter is. A black hole is just as black in a Newtonian universe as an Einsteinian one. Without an understandi

Light is subject to escape velocity the same as matter is. A black hole is just as black in a Newtonian universe as an Einsteinian one. Without an understanding of the warping of spacetime he had no idea of the truly one-way nature of a black hole, but he was right about light not being able to make it out. It's an approximation but a pretty good one.