The event horizon is a theoretical boundary around a black hole where the escape velocity is equal to the speed of light. This means that any object, including light, cannot escape from within the event horizon.
The gravity of the event horizon is extremely strong and can affect objects outside of it by warping space and time. This can cause objects to orbit or be pulled towards the black hole.
Yes, the gravity of the event horizon can be measured indirectly by observing the effects it has on surrounding objects, such as their orbits or the bending of light. It can also be measured using mathematical equations.
According to Einstein's theory of general relativity, there is no limit to the strength of gravity at the event horizon. However, at the center of a black hole, the gravity becomes infinitely strong, resulting in a singularity.
The gravity of the event horizon slows down time, known as gravitational time dilation. This means that time moves slower for objects near the event horizon compared to those further away. This phenomenon has been observed and confirmed by scientists.