What property defines a black hole region of spacetime?
Answer
Gravitational effects are so strong that nothing, not even light, can escape from inside it.
A black hole represents the most extreme outcome of gravitational collapse, occurring when the progenitor star's core mass exceeds the limit capable of being supported by neutron degeneracy pressure. This results in a region of spacetime where gravity has become so overwhelmingly dominant that its escape velocity exceeds the speed of light. Consequently, any matter, energy, or electromagnetic radiation—including light—that crosses the boundary, known as the event horizon, is permanently trapped within the singularity, rendering the object inherently invisible in the traditional sense.
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