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The so-called "event horizon" of a black hole is the point-of-no-return. That means that anything that gets inside the event horizon can't get out any more, even if if it moves at the speed of light.
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What is the shape of black hole?
The event horizon of a black hole is spherical.
What star has an event horizon?
That refers to a black hole - but a black hole is not exactly a star.
Does a white dwarf have a event horizon?
No. Only a black hole has an event horizon.
What is around a black hole?
An "event horizon." This is the range from the black hole at which not even light can escape the pull of gravity. If the black hole is low-mass, this will be sharp, but the horizon of a supermassive black hole might have stars, worlds and people inside going on about their business. However, none of this could be known to anyone outside the horizon.
How big do event horizons get?
Assuming you mean the event horizon of a black hole (there are other types as well), the diameter of a black hole as measured by its event horizon is directly proportional to its mass. The larger the mass, the larger the diameter. Thus, as a black hole's mass increases, it will get bigger. The only limitation is how much mass a black hole is able to incorporate from its surroundings.
What is the difference between a black hole's photon sphere and its event horizon?
The photon sphere is a sphere above the event horizon in which light orbits the black hole.
What is the length of a black hole?
The diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radiusThe diameter is usually considered the diameter of the event horizon. The diameter of this event horizon is directly proportional to the black hole's mass. More information at http://en.wikipedia.org/wiki/Schwarzschild_radius
What is the brilliant light coming from a black hole?
if there is light surrounding a black hole it is normally from material entering into the event horizon of the black hole.
What is a black hole's boundary?
its called the event horizon
What is the place of no return?
The event horizon of a black hole.
How big is the event horizon of a 100-solar-mass black hole?
A black hole of 100 solar masses would have an event horizon 185.3 miles in radius.
What are the two parts of the black hole?
The two parts of a black hole are the event horizon and the singularity. The event horizon is the "surface" of the black hole, and is imaginary. The event horizon's appearance is caused by the bending of light. The singularity is a point of space where everything that gets sucked in is crushed to about the size of an atom.
