What is the outer boundary of a rotating black hole's ergosphere called?
Answer
Static limit
What is the outer boundary of a rotating black hole's ergosphere called?
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Related trivia
- Easy Easy difficulty.
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What boundary around a black hole is the point of no return for light and matter?
Answer
Event horizon
- Intermediate Intermediate difficulty.
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Which astronomer shared the 2020 Nobel Prize for discovering the compact object at the Milky Way's center with Reinhard Genzel?
Answer
Andrea Ghez
- Intermediate Intermediate difficulty.
- Black Holes
In the no-hair theorem, black holes are described by mass, electric charge, and what third quantity?
Answer
Angular momentum
- Intermediate Intermediate difficulty.
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Which mathematician discovered the Kerr metric for rotating black holes in 1963?
Answer
Roy Kerr
- Hard Hard difficulty.
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Which vacuum state models Hawking radiation with no particles incoming from past infinity?
Answer
Unruh state
- Intermediate Intermediate difficulty.
- Black Holes
Which 1939 model describes collapse of a uniform dust sphere into a black hole?
Answer
Oppenheimer-Snyder model