I've read that gravitational lensing bends the light; I am a little confused about black holes and why lensing produces different results. Black holes absorb light whereas lensing should have also done the same but why does gravitational force help bend the light?
Black holes absorb light, but only if it gets close enough to be trapped behind the event horizon. The gravitational field of a black hole is not really different from that of any other massive object. Masses in motion are pulled towards its source, and therefore deviate from their path. Whether they actually fall into the black hole depends on primarily on their distance from the black hole. A light ray that is sufficiently far away from the black hole will only slightly deviate from its path, whereas one that is close to the event horizon may fall be trapped in an orbit and eventually fall in.
It is not the light that is bent in gravitational lensing, it is the space time around the massive object such as a galaxy or a black hole that is actually distorted. The light follows the distortion in space time, giving the lensing effect.In Einstein's General Relativity theory there is no such thing as a force of gravity, massive objects distort space time in their immediate vicinity and smaller objects fall into the "gravity well", the distortion in space-time
I too am confused on lensing. When light is emitted onto an object outside of space, normally it is absorbed like on earth. I'm guessing since objects creates a curvature in space is what affects it? So lensing really only works outside of a planetary object? Am I just reading too much into it?