This answer from the "black holes" section of the Usenet Physics FAQ addresses that question.sajithcv said:Hi friends,.
If black holes absorb light also, how can it exert any gravity outside a particular region? Or something can move faster than light?
A black hole is a region in space where the gravitational pull is so strong that nothing, including light, can escape it. It is formed when a massive star collapses at the end of its life cycle.
The strong gravitational pull of a black hole bends the path of light, making it appear as though the light is being pulled towards the black hole. If the light gets too close to the black hole, it can get pulled in and not be able to escape.
In a black hole, gravity is extremely strong due to the large amount of mass that is concentrated in a small area. This causes space to curve, which is what creates the intense gravitational pull.
Nothing can escape a black hole once it has crossed the event horizon, which is the point of no return. However, if an object is far enough away from the black hole, it can escape its gravitational pull.
Black holes do not emit any light themselves, as they absorb all matter and light that gets pulled into them. However, the area around a black hole, known as the accretion disk, can emit light as matter spirals towards the event horizon.