That makes me also wonder, what's the light?
The Light Can Not Escape The Immense Gravitational Pull
Every gravitating body has what is called the 'escape velocity'. It is how fast something would have to start out from the surface to escape to infinity against the gravitational field. For a black hole, that escape velocity is the speed of light. This means that nothing can escape the gravitational force of a black hole from the surface of the black hole.
Light isnt absorbed by black holes... really. Light always goes perfectly straight when its in a vacuum. Gravity doesnt bend the light, it bends the definition of a straight line, and curves geometry, so the apparent direction of the light is changed. A black hole doesnt absorb it, it just creates a local deformation of spacetime that is so serious that light passing through it is bent into a complete 360 degree circle. It always goes straight, but all straight paths entering a black hole are so deformed that they dont go out again.. they become circles on the inside.
A black hole has such a strong gravitational pull that light can't escape. If you think of light as a particle (photon) then it sort of makes sense that strong forces can affect the particles. After all, electromagnetic waves (including nonvisible light) can be affected by electric and magnetic forces, so why not gravitational forces?
Light is made-up of photons. Photons have mass,(itsy bitsy mass). Black holes have incredible amounts of mass. All mass is attracted to other mass, (gravity). Light attracted to black hole. (black hole is also attracted to light in equal proportion to masses)
