As an Observer Is Investigating a Black Hole from a Safe

question 176

Multiple Choice

As an observer is investigating a black hole from a safe distance, a rivet pops out of the tailfin on their spaceship and falls toward the black hole. Will the observer ever see the rivet enter the event horizon?

• A) Yes. However, it will be so blueshifted that the observer would need X-ray eyes to see it.
• B) No. It will be compressed to zero size and disappear from sight before it reaches the event horizon.
• C) Yes. The observer will see it fall faster and faster until it disappears as it falls through the event horizon.
• D) No. It will appear to stop and hover forever before entering the event horizon.

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Definitions:

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