My basic understanding of light, is it has no mass. So how does gravity affect something that has no mass?
If space time is distorted as it is with a sun. The light is effected indirectly by the mass of the suns effect on the fabric of space time and not gravity directly effecting the light itself.
So we would see a bending or distortion in the light, but the light would not be bent, it would be the bending or distortion of space time.
So a black hole distorts space time to an extent that the light that enters it would travel along until it until it came out the other side. How ever long that might take would depend on how much of a distortion was created in the fabric of space time.
Feel free to shoot me down in flames
Cheers
Phil