BLACK HOLE EVENT HORIZON

The event horizon of a black hole is linked to the object's escape velocity- the speed that one would need to exceed to escape the black hole's gravitational pull. The closer someone came to a black hole, the greater the speed they would need to escape that massive gravity. The event horizon is the threshold around the black hole when the escape velocity surpasses the speed of light. This means a black hole's event horizon is essentially the point from which nothing can return. The event horizon is the ultimate prison wall- one can get in but never get out. When an item gets near an event horizon, a witness would see the item's image redden and dim as gravity distorted light coming from that item. At the event horizon, the image would effectively fade to invisibility. Within the event horizon one would find the black hole's singularity, where all of the object's mass has collapsed to an infinitely dense extent. This means the fabric of space and time around the singularity has also curved to an infinite degree, so the laws of physics as we currently know them break down. The event horizon protects us from the unknown physics near a singularity.