The question is so ill-defined as to be meaningless. Nothing in particular is "happening at the event horizon".
The phrase commonly used to describe the event horizon in black holes is "point of no return."
No. Only black holes have event horizons.
By the diameter of their event horizon.
Black holes do distort time. The closer you get to the event horizon of a black hole, the slower time goes. From the perspective of someone outside, time at the event horizon stops.
No. An event horizon is an area where even light cant escape so only black holes have it
The event horizon balance beam is significant in the study of black holes because it helps scientists understand the concept of an event horizon, which is the point of no return around a black hole where gravity is so strong that nothing, not even light, can escape. By studying how objects behave on the balance beam near the event horizon, researchers can gain insights into the extreme gravitational forces at play near black holes.
It doesn't. The X-rays we detect from black holes are generated by superheated matter before it crosses the event horizon.
Except for supemassive black holes, no. Most black holes have about the same mass as a star, but the event horizon is only a few miles across.
Stars do get sucked into a black hole if they pass the event horizon.
No, white dwarfs do not have an event horizon. Event horizons are a characteristic feature of black holes, where the gravitational pull is so strong that not even light can escape. White dwarfs are dense stellar remnants, but they do not have the extreme gravity needed to form an event horizon.
black holes The black hole we see is the Event Horizon. Its realy not a hole. Just a spherical region in space where matter ceases to exist.
The degree to which time slows depends on the distance to the event horizon. From an outside perspective, time at the event horizon stops.