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What is a black hole?



A. A black hole is a region of space in which the gravitational field is so powerful that nothing, including electromagnetic radiation, can escape its pull after having fallen past its event horizon.
B. A black hole is a gravitional force that has a very strong density and sucks everything including light, nothing can escaped from its pull. Even it has pass through the event horizon except something that is travel faster than light.
C. A black hole is invisible, in bends off the light. It was so powerful that nothing could escape from it, including electromagnetic radiation. For example, a 13mm matter will be crushed into about 1.3 micrometer after sucked by black hole.

This question is part of History/Superstar/Universe Quiz
Asked by Quizmgr, Last updated: Jan 30, 2019

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quizmgr

Quizmgr

Answered on Jan 22, 2019

A black hole is a region of space in which the gravitational field is so powerful that nothing, including electromagnetic radiation, can escape its pull after having fallen past its event horizon.

A black hole is a region of space in which the gravitational field is so powerful that nothing, including electromagnetic radiation, can escape its pull after having fallen past its event horizon. This question only I read from Wikipedia.
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