How Do Black Holes Influence the Path of Light?

[vorcil]

How does the gravity affect of a black hole pull in light?

aren't photons massless?

 

[nicksauce]

In relativity, gravity curves spacetime, and particles (massless and non-massless) follow the shortest paths in that curved spacetime. Therefore, gravity effects photons.

 

[DaveC426913]

Yes, as nicksauce points out, gravity does not pull things; gravity is simply a curve in spacetime. Photons follow this curve, just like massive particles do.