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Black Holes and the Singularity

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Multiple Choice

What is the event horizon of a black hole?

  1. The boundary beyond which nothing, not even light, can escape from the black hole's gravitational pull.
  2. The point at the center of a black hole where matter is infinitely dense.
  3. The region outside the black hole where its gravitational influence is strong.
  4. The boundary beyond which time stops and space becomes infinitely curved.
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