Why Do Black Holes Have Event Horizons?

Black holes are like cosmic vacuum cleaners that suck everything in, and the event horizon is their invisible edge. Once you cross it, nothing, not even light, can come back out. It’s kind of like a one-way door to a super strong gravity trap.

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Examples

A person falling into a black hole is like a ball being sucked into a vacuum cleaner, once it goes past the edge, it can’t come back out.
Imagine walking into a super strong gravity trap and never coming back, that’s what happens at the event horizon.
Light from a star near a black hole gets stretched and blurred as it crosses the invisible boundary.

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Categories: Physics · black hole· event horizon· gravity· space-time· relativity