Exam-style question
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What defines a black hole in terms of escape speed?.
- A.The escape speed exceeds the speed of light
- B.The escape speed is less than the speed of light
- C.The escape speed is equal to the speed of sound
- D.The escape speed is variable depending on the mass
Model answer
What a good answer should say
- The escape speed exceeds the speed of light
Explanation
Why this works
A black hole is defined by its ability to trap light due to its escape speed exceeding the speed of light, making it impossible for anything to escape once it crosses the event horizon.
Common mistake
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