What Is the Event Horizon of a Black Hole?

Imagine a black hole like a super strong vacuum cleaner in space. The event horizon is the invisible edge, once you cross it, you can't come back. It's like trying to escape from a really loud party where no one can hear you anymore.

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Examples

  1. A child falling into a very deep well and never coming out
  2. Trying to escape from a room where the door is locked by gravity itself
  3. Dropping a ball into a black hole, it disappears forever

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